Best Internet Providers in St. Clair County, IL
All 12 providers, ranked by coverage, speed and customer ratings
Find internet availability by address in St. Clair County, IL
St. Clair County has 12 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Fiber, Cable, DSL, and Fixed Wireless internet are available in the county. Reviews are grouped by provider and the type of service they offer, covering all 4 available internet technologies in St. Clair County.
Ranks compare St. Clair County with the 102 Illinois counties.
The Best Internet in St. Clair County, IL at a Glance
St. Clair County Internet Providers, Ranked by Coverage, Speed and Customer Ratings
Spectrum
Connection
Customer Rating
Fiber
Cable
EarthLink
Connection
Customer Rating
Fiber
DSL
Fixed Wireless
AT&T
Connection
Customer Rating
Fiber
DSL
Fixed Wireless
T-Mobile Home Internet
Connection
Customer Rating
Fixed Wireless
Providers with less than 1% coverage in this county are excluded from the list. To see if one of these providers is available at your home, please use the address search above.
Speed and technology may vary by address for all providers. Please note we may have a financial relationship with some of the providers above, which does not impact the customer ratings displayed. Customer ratings listed above are national ratings, local St. Clair County ratings may vary and are shown below.
Who is the Best Internet Provider in St. Clair County, IL?
T-Mobile Home Internet is the best internet provider in St. Clair County based on Illinois customer satisfaction ratings and reviews. Based on our extensive and unbiased survey, T-Mobile Home Internet had the best reviews at the local, state, and national levels versus all available providers in St. Clair County, making it a solid recommendation among providers with reviews. T-Mobile Home Internet is an option for 94.97% of the county.
Click here to get T-Mobile Home Internet
or call 1-833-601-2935
Which Providers are Available at my Home in St. Clair County?
Coverage changes block by block. Pick a provider and a technology to see where its service reaches: the darker the area, the larger the share of homes it covers. For your exact address, use the address search above.
Coverage map for each provider in St. Clair County
- i3 Broadband - fiber coverage map
- Spectrum - cable coverage map
- Sparklight - fiber coverage map
- AT&T - fiber coverage map
- EarthLink - fiber coverage map
- Frontier - fiber coverage map
- Verizon - fixed wireless coverage map
- Wisper Internet - fixed wireless coverage map
- T-Mobile Home Internet - fixed wireless coverage map
- AT&T - dsl coverage map
- EarthLink - dsl coverage map
- Spectrum - fiber coverage map
- AT&T - fixed wireless coverage map
- EarthLink - fixed wireless coverage map
- Sparklight - cable coverage map
- Mediacom - cable coverage map
- HTC - dsl coverage map
- PCs for People - fixed wireless coverage map
- Frontier - dsl coverage map
How St. Clair County Compares to the Rest of Illinois
St. Clair County's report card score is tied 40th of 102 and its connectivity index is tied 14th of 102.
| Measure | St. Clair County | Rank among Illinois counties | Illinois | US | Leader |
|---|---|---|---|---|---|
| ISP Report Card inputs: what providers offer here | |||||
| Fiber availability | 49.1% | 86th of 102 | 47.6% | 71.5% | Hardin County (99.4%) |
| Average top speed | 3,422 Mbps | 48th of 102 | 3,187 Mbps | 3,486 Mbps | Champaign County (6,608 Mbps) |
| Providers at a typical address | 7.2 | Tied 22nd of 102 | 7.3 | 7.1 | Champaign County (9.4) |
| Connectivity index inputs: how much households need and use the internet | |||||
| People per household | 2.6 | Tied 11th of 102 | 2.6 | 2.7 | Calhoun County (3.6) |
| Workers who work from home | 13% | Tied 13th of 102 | 16% | 15% | DuPage County (22%) |
| Homes with a computer, tablet or phone | 95% | Tied 16th of 102 | 95% | 96% | DuPage County and Kendall County and 1 more (98%) |
| Homes with internet | 91% | Tied 14th of 102 | 91% | 91% | Kendall County and McHenry County (96%) |
| Homes on fiber, cable or DSL | 73% | Tied 16th of 102 | 75% | 76% | Kendall County (86%) |
| More about the households here | |||||
| Homes with a desktop or laptop | 78% | Tied 19th of 102 | 81% | 81% | Kendall County (90%) |
| Median household income | $86,744 | 17th of 102 | $95,616 | $93,246 | Lake County ($124,748) |
| Residents in school (6th grade to college) | 16% | Tied 14th of 102 | 16% | 16% | Champaign County (31%) |
Fiber reaches 49.1% of homes in St. Clair County, against 47.6% across Illinois. Households in St. Clair County are smaller than the US average (2.6 people against 2.7); 13% of workers work from home (US 15%); and the median household income is $86,744 (US $93,246).
Our demographic data is sourced from the latest 5-year release of the American Community Survey by the US Census Bureau.
How St. Clair County Compares to Its Neighbors
St. Clair County has 7 neighbors, 2 of them in Missouri. Among them, St. Louis County, MO has the most homes with fiber (83.2%) and Clinton County the fewest (41.2%); St. Clair County has 49.1%.
Map of St. Clair County and its neighbors by ISP Report Card grade
Hover over or tap a county for its numbers, and click through to its page.
St. Clair County and its neighbors
| County | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| St. Clair County (this page) | 257,400 | 49.1% | 3,422 Mbps | 7.2 | B- | 62/100 |
| St. Louis County, MO | 1,004,125 | 83.2% | 4,262 Mbps | 9.4 | A- | 73/100 |
| St. Louis City, MO | 301,578 | 70.4% | 3,269 Mbps | 8.7 | B+ | 46/100 |
| Madison County | 265,859 | 56.1% | 3,277 Mbps | 7.3 | B | 62/100 |
| Clinton County | 36,899 | 41.2% | 3,054 Mbps | 6.5 | B- | 52/100 |
| Monroe County | 34,962 | 63.6% | 993 Mbps | 5.5 | C | 67/100 |
| Randolph County | 30,163 | 68.2% | 4,347 Mbps | 5 | B- | 35/100 |
| Washington County | 13,761 | 42.4% | 2,283 Mbps | 5.1 | C+ | 33/100 |
Internet in St. Clair County by City and ZIP Code
Fiber reaches from 0.0% of homes in Alorton to 89.8% in Mascoutah; by ZIP code, from 0.0% in 62225 (Scott Air Force Base) to 87.7% in 62208 (Fairview Heights). Each row links to that place’s page.
Cities and towns in St. Clair County
| City or town | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| Belleville | 64,104 | 62.2% | 4,116 Mbps | 7.4 | B | 57/100 |
| O'Fallon | 31,116 | 53.7% | 3,387 Mbps | 8 | B | 82/100 |
| East St. Louis | 19,878 | 17.1% | 1,379 Mbps | 7.2 | C+ | 39/100 |
| Fairview Heights | 16,716 | 85.2% | 5,847 Mbps | 8.6 | A- | 56/100 |
| Shiloh | 16,113 | 77.0% | 6,313 Mbps | 8.4 | B+ | 71/100 |
| Swansea | 15,407 | 61.5% | 4,551 Mbps | 7.9 | B | 69/100 |
| Cahokia | 11,691 | 4.2% | 1,085 Mbps | 7 | C | 58/100 |
| Mascoutah | 9,454 | 89.8% | 4,702 Mbps | 5.3 | B | 78/100 |
| Caseyville | 8,771 | 70.0% | 4,836 Mbps | 7.7 | B+ | 62/100 |
| Millstadt | 8,251 | 11.8% | 1,209 Mbps | 5.6 | C | 41/100 |
| Lebanon | 7,597 | 8.2% | 1,250 Mbps | 7.2 | C+ | 68/100 |
| Freeburg | 6,460 | 15.9% | 1,665 Mbps | 5.7 | C | 63/100 |
| Smithton | 4,861 | 30.4% | 2,123 Mbps | 5.7 | C+ | 63/100 |
| Dupo | 4,600 | 34.7% | 1,418 Mbps | 6.8 | C+ | 55/100 |
| Centreville | 4,376 | 24.4% | 1,671 Mbps | 5.9 | C | 42/100 |
| Scott AFB | 3,699 | 0.0% | 1,000 Mbps | 2 | D- | 90/100 |
| New Athens | 2,934 | 9.7% | 1,366 Mbps | 4.7 | C- | 30/100 |
| Washington Park | 2,598 | 5.5% | 998 Mbps | 6.4 | C- | 57/100 |
| Marissa | 2,424 | 87.0% | 5,815 Mbps | 5.6 | B | 29/100 |
| Fairmont City | 2,310 | 10.8% | 1,000 Mbps | 6 | C- | 39/100 |
| East Carondelet | 1,663 | 29.6% | 1,214 Mbps | 6.1 | C | 41/100 |
| Alorton | 1,539 | 0.0% | 996 Mbps | 5 | D+ | 16/100 |
| Scott Air Force Base | 1,490 | 9.3% | 1,538 Mbps | 4.8 | C- | 85/100 |
| Lenzburg | 1,053 | 5.5% | 561 Mbps | 2.8 | D- | 28/100 |
| Summerfield | 827 | 6.0% | 981 Mbps | 4.9 | D+ | 53/100 |
| St. Libory | 738 | 98.5% | 1,262 Mbps | 2.4 | C+ | 35/100 |
| Lovejoy | 549 | 86.7% | 1,301 Mbps | 7.5 | B | 34/100 |
| Sauget | 456 | 0.0% | 1,000 Mbps | 7.1 | C- | 28/100 |
| Fayetteville | 368 | 1.4% | 165 Mbps | 1.8 | D- | 42/100 |
| Brooklyn | 178 | 89.9% | 1,000 Mbps | 8 | B | 35/100 |
| Floraville | 174 | 15.5% | 316 Mbps | 3.7 | D | 54/100 |
| Old Marissa | 152 | 54.0% | 3,853 Mbps | 4.9 | C+ | 33/100 |
ZIP codes in St. Clair County
| ZIP code | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| 62269 (O'Fallon) | 35,233 | 49.8% | 3,238 Mbps | 7.9 | B | 82/100 |
| 62221 (Belleville) | 29,685 | 83.1% | 6,569 Mbps | 8.5 | A- | 67/100 |
| 62226 (Belleville) | 29,236 | 56.2% | 3,864 Mbps | 7.3 | B | 58/100 |
| 62220 (Belleville) | 19,387 | 56.9% | 3,845 Mbps | 7.8 | B | 56/100 |
| 62208 (Fairview Heights) | 16,973 | 87.7% | 6,020 Mbps | 8.6 | A- | 55/100 |
| 62223 (Belleville) | 16,122 | 58.0% | 2,942 Mbps | 6.5 | B- | 63/100 |
| 62206 (Cahokia) | 12,929 | 3.9% | 1,076 Mbps | 6.9 | C | 55/100 |
| 62258 (Mascoutah) | 10,386 | 83.8% | 4,391 Mbps | 5.1 | B- | 76/100 |
| 62232 (Caseyville) | 7,581 | 68.5% | 4,837 Mbps | 7.7 | B+ | 60/100 |
| 62260 (Millstadt) | 7,215 | 1.1% | 795 Mbps | 5.4 | D+ | 38/100 |
| 62207 (East St. Louis) | 7,050 | 7.2% | 1,380 Mbps | 6 | C | 36/100 |
| 62254 (Lebanon) | 6,643 | 8.5% | 1,297 Mbps | 6.9 | C | 65/100 |
| 62205 (East St. Louis) | 6,619 | 2.7% | 1,000 Mbps | 7.3 | C | 46/100 |
| 62203 (East St. Louis) | 6,427 | 52.8% | 1,886 Mbps | 7.4 | B- | 50/100 |
| 62243 (Freeburg) | 5,981 | 15.7% | 1,683 Mbps | 5.7 | C | 63/100 |
| 62225 (Scott Air Force Base) | 5,343 | 0.0% | 1,000 Mbps | 3.3 | D- | 89/100 |
| 62201 (East St. Louis) | 5,115 | 12.4% | 1,385 Mbps | 6.8 | C+ | 33/100 |
| 62285 (Smithton) | 4,756 | 30.2% | 2,174 Mbps | 5.7 | C+ | 64/100 |
| 62239 (Dupo) | 4,667 | 35.4% | 1,417 Mbps | 6.7 | C+ | 54/100 |
| 62204 (East St. Louis) | 4,483 | 4.0% | 998 Mbps | 6.3 | C- | 23/100 |
| 62264 (New Athens) | 3,138 | 8.2% | 1,266 Mbps | 4.7 | C- | 30/100 |
| 62257 (Marissa) | 2,680 | 83.9% | 5,508 Mbps | 5.5 | B | 28/100 |
| 62240 (East Carondelet) | 1,611 | 32.1% | 1,520 Mbps | 6.3 | C+ | 38/100 |
| 62255 (Lenzburg) | 946 | 4.3% | 560 Mbps | 2.6 | D- | 27/100 |
| 62059 (Lovejoy) | 634 | 98.4% | 1,260 Mbps | 7.9 | B+ | 35/100 |
| 62282 (St. Libory) | 621 | 100.0% | 1,329 Mbps | 2.3 | C+ | 33/100 |
| 62289 (Summerfield) | 348 | 0.0% | 1,000 Mbps | 4.3 | D | 51/100 |
Who is the Fastest Internet Provider in St. Clair County?
According to unbiased feedback from real internet customers, they reported being happiest with speeds provided by T-Mobile Home Internet. On the other hand, based on data provided by the internet providers to the FCC, Spectrum should have faster speeds at a local level. While we typically put more weight on real-world customer ratings, we display both satisfaction and technical maximum information for customers to decide for themselves.
Data Reported to FCC by ISPs: Average Maximum Available in St. Clair County
| i3 Broadband | 8,000 |
|---|---|
| Sparklight | 7,000 |
| Frontier Communications | 7,000 |
| AT&T | 5,000 |
| EarthLink | 5,000 |
| Spectrum | 1,000 |
| Harrisonville Telephone Company | 1,000 |
| Mediacom | 1,000 |
| Wisper Internet | 800 |
| Verizon | 300 |
| T-Mobile Home Internet | 100 |
| Viasat | 100 |
| PCs for People | 50 |
| HughesNet | 25 |
How fast is your internet?
Test your connection here and see it next to the speeds providers advertise in St. Clair County. It takes about 20 seconds and, on a fast line, can move a few hundred MB of data.
Customer Ratings for St. Clair County Internet Providers
Based on 148 reviews from Illinois internet customers, T-Mobile Home Internet is the best internet service provider for St. Clair County residents. T-Mobile Home Internet was rated at an average of 3.94 out of 5 in our report for overall customer satisfaction. Verizon wins for second-place in Illinois, with 4.00 out of 5 stars and 85.6% coverage in St. Clair County.
At a national level, based on 4568 national reviews for any of the providers listed above, T-Mobile Home Internet is rated higher than any other provider, with a rating of 4.02 out of 5.
Local, State, and National Ratings for all St. Clair County Internet Providers
The table below shows average customer ratings from customers in St. Clair County, Illinois, and customers throughout the country.
| ISP / Tech Type | St. Clair County Overall | Illinois Overall | National Overall | For Service | ||
|---|---|---|---|---|---|---|
| i3 Broadband |  (0) | (19) | (29) | View Plans | ||
| T-Mobile Home Internet | (0) | (18) | (342) | View Plans | ||
| Verizon | (0) | (9) | (816) | View Plans | ||
| PCs for People | (0) | (1) |  (4) | View Plans | ||
| AT&T | (0) | (51) | (1051) | View Plans | ||
| HTC | (0) | (3) | (7) | View Plans | ||
| Sparklight | (0) | (6) | (82) | View Plans | ||
| Wisper Internet | (0) |  (1) | (3) | View Plans | ||
| Mediacom | (0) | (20) | (93) | View Plans | ||
| Viasat | (0) |  (1) |  (12) | View Plans | ||
| Frontier | (0) | (5) | (177) | View Plans | ||
| Spectrum | (4) | (15) | (1949) | View Plans | ||
| EarthLink | (0) | (0) | (15) | View Plans | ||
| HughesNet | (0) | (0) |  (25) | View Plans |
Customer Ratings for Internet Provider Speeds in St. Clair County
Based on data reported by St. Clair County ISPs to the FCC, the fastest speeds in the county are available through Spectrum. The company offers speeds up to 1,000 Mbps in St. Clair County. Therefore, the average customer can get up to 1,000 Mbps if they’re willing to purchase the fastest subscription tier available at their homes.
However, actual customers rated their satisfaction with internet speed highest with T-Mobile Home Internet. This indicates T-Mobile Home Internet reliably delivers speeds expected by the customer based on the plan they are paying for.
| ISP / Tech Type | St. Clair County Speed | Illinois Speed | National Speed | For Service | ||
|---|---|---|---|---|---|---|
| i3 Broadband | (0) |  (19) | (29) | View Plans | ||
| T-Mobile Home Internet | (0) | (18) | (342) | View Plans | ||
| Mediacom | (0) | (20) | (93) | View Plans | ||
| Verizon | (0) | (9) | (816) | View Plans | ||
| Sparklight | (0) | (6) | (82) | View Plans | ||
| PCs for People | (0) | (1) | (4) | View Plans | ||
| HTC | (0) | (3) | (7) | View Plans | ||
| Frontier | (0) | (5) | (177) | View Plans | ||
| Spectrum | (4) | (15) | (1949) | View Plans | ||
| AT&T | (0) | (51) | (1051) | View Plans | ||
| Viasat | (0) | (1) | (12) | View Plans | ||
| Wisper Internet | (0) | (1) | (3) | View Plans | ||
| EarthLink | (0) | (0) | (15) | View Plans | ||
| HughesNet | (0) | (0) | (25) | View Plans |
Who is the Cheapest Internet Provider in St. Clair County?
Of the providers in St. Clair County, customers rate Verizon the best for price. Data comes from customers rating their satisfaction with pricing: in St. Clair County where enough of them have reviewed a provider, otherwise across Illinois or the country. This feedback is valuable because it considers price changes and whether the speeds paid for are worth it.
Verizon is rated 4.00 out of 5 for price, which is higher than the average across all internet providers in the country. T-Mobile Home Internet is rated second for affordability, with an average price rating of 3.78 out of 5.
The table below shows how customers in St. Clair County, Illinois, and the United States rated the affordability of their internet service.
Rated Affordability in St. Clair County
| ISP / Tech Type | St. Clair County Affordability | Illinois Affordability | National Affordability | For Service | ||
|---|---|---|---|---|---|---|
| i3 Broadband | (0) | (19) | (29) | View Plans | ||
| Verizon | (0) | (9) | (816) | View Plans | ||
| T-Mobile Home Internet | (0) | (18) | (342) | View Plans | ||
| PCs for People | (0) | (1) | (4) | View Plans | ||
| Frontier | (0) | (5) | (177) | View Plans | ||
| AT&T | (0) | (51) | (1051) | View Plans | ||
| Wisper Internet | (0) | (1) | (3) | View Plans | ||
| Sparklight | (0) | (6) | (82) | View Plans | ||
| Viasat | (0) | (1) | (12) | View Plans | ||
| HTC | (0) | (3) | (7) | View Plans | ||
| Spectrum | (4) | (15) | (1949) | View Plans | ||
| Mediacom | (0) | (20) | (93) | View Plans | ||
| EarthLink | (0) | (0) | (15) | View Plans | ||
| HughesNet | (0) | (0) | (25) | View Plans |
Fiber, 5G, Cable and DSL Internet in St. Clair County
Which Fiber Internet Providers are Available in St. Clair County?
EarthLink Fiber in St. Clair County, IL
Availability:
20.0%
Customer Rating:
(6)
Avg. Download Speed
3,653 Mbps
EarthLink offers Fiber service to 20.0% of St. Clair County homes. Across the county, EarthLink Fiber has speeds up to 3,653 Mbps, with speeds from 1,000 Mpbs up to 5,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for EarthLink Fiber. EarthLink Fiber is rated about the same as other types of internet service available in St. Clair County from EarthLink in terms of customer satisfaction.
AT&T Fiber in St. Clair County, IL
Availability:
20.0%
Customer Rating:
(542)
Avg. Download Speed
3,653 Mbps
AT&T offers Fiber service to 20.0% of St. Clair County homes. Across the county, AT&T Fiber has speeds up to 3,653 Mbps, with speeds from 1,000 Mpbs up to 5,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for AT&T Fiber. AT&T Fiber is rated lower than other types of internet service available in St. Clair County from AT&T in terms of customer satisfaction.
i3 Broadband Fiber in St. Clair County, IL
Availability:
19.7%
Customer Rating:
(27)
Avg. Download Speed
8,000 Mbps
i3 Broadband offers Fiber service to 19.7% of St. Clair County homes. Across the county, i3 Broadband Fiber is the only type of service available from the company, with speeds up to 8,000 Mbps
Sparklight Fiber in St. Clair County, IL
Availability:
11.0%
Customer Rating:
(23)
Avg. Download Speed
7,000 Mbps
Sparklight offers Fiber service to 11.0% of St. Clair County homes. Across the county, Sparklight Fiber has speeds up to 7,000 Mbps
Spectrum Fiber in St. Clair County, IL
Availability:
4.3%
Customer Rating:
(207)
Avg. Download Speed
1,000 Mbps
Spectrum offers Fiber service to 4.3% of St. Clair County homes. Across the county, Spectrum Fiber has speeds up to 1,000 Mbps
Frontier Fiber in St. Clair County, IL
Availability:
4.0%
Customer Rating:
(119)
Avg. Download Speed
5,343 Mbps
Frontier Communications offers Fiber service to 4.0% of St. Clair County homes. Across the county, Frontier Fiber has speeds up to 5,343 Mbps, with speeds from 2,000 Mpbs up to 7,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for Frontier Fiber. Frontier Fiber is rated about the same as other types of internet service available in St. Clair County from Frontier in terms of customer satisfaction.
Which Fixed Wireless and LTE Internet Providers are Available in St. Clair County?
T-Mobile Home Internet Fixed Wireless in St. Clair County, IL
Availability:
95.0%
Customer Rating:
(342)
Avg. Download Speed
65 Mbps
T-Mobile Home Internet offers Fixed Wireless service to 95.0% of St. Clair County homes. Across the county, T-Mobile Home Internet Fixed Wireless is the only type of service available from the company, with speeds up to 65 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 12 Mbps throughout the county.
Verizon Fixed Wireless in St. Clair County, IL
Availability:
85.6%
Customer Rating:
(362)
Avg. Download Speed
202 Mbps
Verizon offers Fixed Wireless service to 85.6% of St. Clair County homes. Across the county, Verizon Fixed Wireless is the only type of service available from the company, with speeds up to 202 Mbps, with speeds from 25 Mpbs up to 300 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 6.0 and as high as 20, with an average of 15 Mbps throughout the county.
EarthLink Fixed Wireless in St. Clair County, IL
Availability:
74.5%
Customer Rating:
(4)
Avg. Download Speed
40 Mbps
EarthLink offers Fixed Wireless service to 74.5% of St. Clair County homes. Across the county, EarthLink Fixed Wireless has speeds up to 40 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 6.4 Mbps throughout the county.
AT&T Fixed Wireless in St. Clair County, IL
Availability:
74.5%
Customer Rating:
(205)
Avg. Download Speed
40 Mbps
AT&T offers Fixed Wireless service to 74.5% of St. Clair County homes. Across the county, AT&T Fixed Wireless has speeds up to 40 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 6.4 Mbps throughout the county.
Wisper Internet Fixed Wireless in St. Clair County, IL
Availability:
50.6%
Customer Rating:
(2)
Avg. Download Speed
193 Mbps
Wisper Internet offers Fixed Wireless service to 50.6% of St. Clair County homes. Across the county, Wisper Internet Fixed Wireless is the only type of service available from the company, with speeds up to 193 Mbps, with speeds from 10 Mpbs up to 800 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 250, with an average of 26 Mbps throughout the county.
PCs for People Fixed Wireless in St. Clair County, IL
Availability:
3.5%
Customer Rating:
(4)
Avg. Download Speed
50 Mbps
PCs for People offers Fixed Wireless service to 3.5% of St. Clair County homes. Across the county, PCs for People Fixed Wireless is the only type of service available from the company, with speeds up to 50 Mbps
Which Cable Internet Providers are Available in St. Clair County?
Spectrum Cable in St. Clair County, IL
Availability:
89.1%
Customer Rating:
(1739)
Avg. Download Speed
1,000 Mbps
Spectrum offers Cable service to 89.1% of St. Clair County homes. Across the county, Spectrum Cable has speeds up to 1,000 Mbps
Sparklight Cable in St. Clair County, IL
Availability:
1.9%
Customer Rating:
(58)
Avg. Download Speed
1,000 Mbps
Sparklight offers Cable service to 1.9% of St. Clair County homes. Across the county, Sparklight Cable has speeds up to 1,000 Mbps
Mediacom Cable in St. Clair County, IL
Availability:
1.7%
Customer Rating:
(82)
Avg. Download Speed
1,000 Mbps
Mediacom offers Cable service to 1.7% of St. Clair County homes. Across the county, Mediacom Cable is the only type of service available from the company, with speeds up to 1,000 Mbps
Which DSL Internet Providers are Available in St. Clair County?
EarthLink DSL in St. Clair County, IL
Availability:
72.0%
Customer Rating:
(5)
Avg. Download Speed
66 Mbps
EarthLink offers DSL service to 72.0% of St. Clair County homes. Across the county, EarthLink DSL has speeds up to 66 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 14 Mbps throughout the county. EarthLink DSL is rated higher than other types of internet service available in St. Clair County from EarthLink in terms of customer satisfaction.
AT&T DSL in St. Clair County, IL
Availability:
72.0%
Customer Rating:
(304)
Avg. Download Speed
66 Mbps
AT&T offers DSL service to 72.0% of St. Clair County homes. Across the county, AT&T DSL has speeds up to 66 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 14 Mbps throughout the county. AT&T DSL is rated about the same as other types of internet service available in St. Clair County from AT&T in terms of customer satisfaction.
Frontier DSL in St. Clair County, IL
Availability:
4.9%
Customer Rating:
(58)
Avg. Download Speed
28 Mbps
Frontier Communications offers DSL service to 4.9% of St. Clair County homes. Across the county, Frontier DSL has speeds up to 28 Mbps, with speeds from 10 Mpbs up to 115 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 7.0, with an average of 1.9 Mbps throughout the county. Frontier DSL is rated higher than other types of internet service available in St. Clair County from Frontier in terms of customer satisfaction.
HTC DSL in St. Clair County, IL
Availability:
2.6%
Customer Rating:
(5)
Avg. Download Speed
87 Mbps
Harrisonville Telephone Company offers DSL service to 2.6% of St. Clair County homes. Across the county, HTC DSL is the only type of service available from the company, with speeds up to 87 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 17 Mbps throughout the county.
Customer Reviews for Internet Service Providers in Illinois
Customer Reviews
ISPReports User
Pavlov Media Fiber
November 13, 2026 Carol
McDonough Telephone Cooperative Fiber
October 26, 2026 Fast, friendly service. Appreciate being able to get quick help by calling. Actually get a person on the phone
ISPReports User
McDonough Telephone Cooperative Fiber
October 09, 2026 61438
McDonough Telephone Cooperative Fiber
October 08, 2026 MTC has been a great internet for my family. Rather it be gaming system speed, or just watching tv in multiple rooms, The internet seems to run smoothly. I very seldom have internet interruption. When we do it is usually due to storm taking out a pole, or upgrading the system. It usually has been a short time when it does happen.
ISPReports User
MTC Technologies Fiber
October 08, 2026 Rate your provider
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Which ISP Should You Choose in St. Clair County?
The right ISP for you depends upon your needs, but in general we can make the following suggestions:
- The best all-around internet service provider in St. Clair County is T-Mobile Home Internet.
- The fastest internet provider should be Spectrum. Considering speed for the money and reliability in speeds, T-Mobile Home Internet may be a better choice based on real-world local customer feedback.
- The most affordable internet provider in St. Clair County is Verizon.
- Viasat, T-Mobile Home Internet, and HughesNet has the broadest coverage in St. Clair County, available to 95.0% of homes, and is most likely to cover your home. To find out exactly what’s available at your home, please use our address search tool.