Best Internet Providers in Port Costa, CA
All 6 providers, ranked by coverage, speed and customer ratings
Find internet availability by address in Port Costa, CA
Port Costa has 6 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Cable, Fixed Wireless, and DSL internet are available in the city. Reviews are grouped by provider and the type of service they offer, covering all 3 available internet technologies in Port Costa.
Ranks compare Port Costa with the 31,388 US places under 1,000 people, the tiers of our fastest-cities rankings.
The Best Internet in Port Costa, CA at a Glance
Port Costa Internet Providers, Ranked by Coverage, Speed and Customer Ratings
EarthLink
Connection
Customer Rating
DSL
Fixed Wireless
AT&T
Connection
Customer Rating
DSL
Fixed Wireless
XFINITY
Connection
Customer Rating
Cable
Verizon
Connection
Customer Rating
Fixed Wireless
Providers with less than 1% coverage in this city 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 Port Costa ratings may vary and are shown below.
Who is the Best Internet Provider in Port Costa, CA?
T-Mobile Home Internet is the best internet provider in Port Costa based on California 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 Port Costa, making it a solid recommendation among providers with reviews. T-Mobile Home Internet is an option for 65.72% of the city.
Click here to get T-Mobile Home Internet
or call 1-833-601-2935
Which Providers are Available at my Home in Port Costa?
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 Port Costa
How Port Costa Compares to Places Its Size
Port Costa's report card score is in the bottom 37% and its connectivity index is in the top 6%.
| Measure | Port Costa | Rank among US places under 1,000 people | Contra Costa County | California | US | Leader |
|---|---|---|---|---|---|---|
| ISP Report Card inputs: what providers offer here | ||||||
| Fiber availability | 0.0% | bottom 22% | 58.4% | 62.4% | 71.5% | 6,946 places at 100.0% |
| Average top speed | 1,089 Mbps | top 36% | 4,517 Mbps | 3,834 Mbps | 3,486 Mbps | Fairmount, TN and Falling Water, TN and 5 more (25,000 Mbps) |
| Providers at a typical address | 6 | top 20% | 8.6 | 8 | 7.1 | Los Prados, PR (15.1) |
| Connectivity index inputs: how much households need and use the internet | ||||||
| People per household | 2.1 | bottom 15% | 2.9 | 3.0 | 2.7 | Paguate, NM (13.4) |
| Workers who work from home | 29% | top 3% | 21% | 17% | 15% | Boys Town, NE (100%) |
| Homes with a computer, tablet or phone | 100% | top 1% | 98% | 97% | 96% | Tied with 1,493 other places at 100% |
| Homes with internet | 98% | top 3% | 96% | 94% | 91% | 370 places at 100% |
| Homes on fiber, cable or DSL | 80% | top 9% | 83% | 79% | 76% | 23 places at 100% |
| More about the households here | ||||||
| Homes with a desktop or laptop | 91% | top 4% | 88% | 84% | 81% | 72 places at 100% |
| Median household income | $103,534 | top 10% | $140,647 | $111,728 | $93,246 | 22 places at $250,001 |
| Residents in school (6th grade to college) | 14% | top 28% | 16% | 17% | 16% | University at Buffalo, NY (100%) |
Fiber reaches 0.0% of homes in Port Costa, against 58.4% across Contra Costa County and 62.4% across California. Households in Port Costa are smaller than the US average (2.1 people against 2.7); 29% of workers work from home (US 15%); and the median household income is $103,534 (US $93,246).
Our demographic data is sourced from the latest 5-year release of the American Community Survey by the US Census Bureau.
Fiber, 5G, Cable and DSL Internet in Port Costa
Which Fiber Internet Providers are Available in Port Costa?
According to the most recently submitted data by internet service providers to the FCC, there are currently no fiber providers available in Port Costa, CA.
Which Fixed Wireless and LTE Internet Providers are Available in Port Costa?
EarthLink Fixed Wireless in Port Costa, CA
Availability:
73.0%
Customer Rating:
(4)
Avg. Download Speed
25 Mbps
EarthLink offers Fixed Wireless service to 73.0% of Port Costa homes. Across the city, EarthLink Fixed Wireless has speeds up to 25 Mbps
AT&T Fixed Wireless in Port Costa, CA
Availability:
73.0%
Customer Rating:
(205)
Avg. Download Speed
25 Mbps
AT&T offers Fixed Wireless service to 73.0% of Port Costa homes. Across the city, AT&T Fixed Wireless has speeds up to 25 Mbps
Verizon Fixed Wireless in Port Costa, CA
Availability:
71.4%
Customer Rating:
(362)
Avg. Download Speed
255 Mbps
Verizon offers Fixed Wireless service to 71.4% of Port Costa homes. Across the city, Verizon Fixed Wireless is the only type of service available from the company, with speeds up to 255 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 18 Mbps throughout the city.
T-Mobile Home Internet Fixed Wireless in Port Costa, CA
Availability:
65.7%
Customer Rating:
(342)
Avg. Download Speed
67 Mbps
T-Mobile Home Internet offers Fixed Wireless service to 65.7% of Port Costa homes. Across the city, T-Mobile Home Internet Fixed Wireless is the only type of service available from the company, with speeds up to 67 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 13 Mbps throughout the city.
Unwired Fixed Wireless in Port Costa, CA
Availability:
27.4%
Customer Rating:
(1)
Avg. Download Speed
300 Mbps
Unwired offers Fixed Wireless service to 27.4% of Port Costa homes. Across the city, Unwired Fixed Wireless is the only type of service available from the company, with speeds up to 300 Mbps
Which Cable Internet Providers are Available in Port Costa?
XFINITY Cable in Port Costa, CA
Availability:
83.0%
Customer Rating:
(2077)
Avg. Download Speed
1,200 Mbps
XFINITY from Comcast offers Cable service to 83.0% of Port Costa homes. Across the city, XFINITY Cable is the only type of service available from the company, with speeds up to 1,200 Mbps
Which DSL Internet Providers are Available in Port Costa?
EarthLink DSL in Port Costa, CA
Availability:
83.3%
Customer Rating:
(5)
Avg. Download Speed
21 Mbps
EarthLink offers DSL service to 83.3% of Port Costa homes. Across the city, EarthLink DSL has speeds up to 21 Mbps, with speeds from 10 Mpbs up to 50 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 10, with an average of 3.5 Mbps throughout the city. EarthLink DSL is rated higher than other types of internet service available in Port Costa from EarthLink in terms of customer satisfaction.
AT&T DSL in Port Costa, CA
Availability:
83.3%
Customer Rating:
(304)
Avg. Download Speed
21 Mbps
AT&T offers DSL service to 83.3% of Port Costa homes. Across the city, AT&T DSL has speeds up to 21 Mbps, with speeds from 10 Mpbs up to 50 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 10, with an average of 3.5 Mbps throughout the city. AT&T DSL is rated about the same as other types of internet service available in Port Costa from AT&T in terms of customer satisfaction.
Internet in Port Costa by Neighborhood and ZIP Code
Port Costa has 1 ZIP code with its own page. Each row links to that place’s page.
Neighborhoods in Port Costa
| Neighborhood | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|
ZIP codes in Port Costa
| ZIP code | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| 94569 | 212 | 0.0% | 1,185 Mbps | 6 | C- | 73/100 |
How Port Costa Compares to Nearby Places
The 10 places nearest to Port Costa that have their own pages are all within 9 miles. Among them, Crockett has the most homes with fiber (89.7%) and Reliez Valley the fewest (0.0%); Port Costa has 0.0%.
| Place | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| Port Costa (this page) | 318 | 0.0% | 1,089 Mbps | 6 | C- | 74/100 |
| Vallejo | 128,830 | 47.9% | 4,359 Mbps | 7.6 | B | 72/100 |
| Martinez | 49,575 | 62.4% | 2,774 Mbps | 8.6 | B | 81/100 |
| Benicia | 27,643 | 33.6% | 2,812 Mbps | 7.5 | B- | 86/100 |
| El Sobrante | 26,354 | 68.0% | 5,934 Mbps | 8.9 | B+ | 88/100 |
| Pinole | 22,289 | 55.3% | 5,316 Mbps | 8.6 | B+ | 76/100 |
| Hercules | 20,951 | 14.9% | 2,285 Mbps | 7.2 | C+ | 87/100 |
| Rodeo | 11,463 | 54.0% | 3,247 Mbps | 8.4 | B | 87/100 |
| Crockett | 3,257 | 89.7% | 4,052 Mbps | 8.5 | A- | 72/100 |
| Reliez Valley | 1,241 | 0.0% | 1,254 Mbps | 7.1 | C | 96/100 |
| Tormey | 31 | 0.0% | 1,200 Mbps | 8 | C | 86/100 |
Who is the Fastest Internet Provider in Port Costa?
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, XFINITY from Comcast 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 Port Costa
| XFINITY from Comcast | 1,200 |
|---|---|
| Verizon | 300 |
| Unwired | 300 |
| Viasat | 100 |
| T-Mobile Home Internet | 100 |
| AT&T | 50 |
| EarthLink | 50 |
| HughesNet | 25 |
How fast is your internet?
Test your connection here and see it next to the speeds providers advertise in Port Costa. It takes about 20 seconds and, on a fast line, can move a few hundred MB of data.
Customer Ratings for Port Costa Internet Providers
Based on 388 reviews from California internet customers, T-Mobile Home Internet is the best internet service provider for Port Costa residents. T-Mobile Home Internet was rated at an average of 4.11 out of 5 in our report for overall customer satisfaction. Verizon wins for second-place in California, with 3.61 out of 5 stars and 71.4% coverage in Port Costa.
At a national level, based on 4604 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 Port Costa Internet Providers
The table below shows average customer ratings from customers in Port Costa, California, and customers throughout the country.
| ISP / Tech Type | Port Costa Overall | California Overall | National Overall | For Service | ||
|---|---|---|---|---|---|---|
| T-Mobile Home Internet |  (0) | (27) | (342) | View Plans | ||
| Verizon | (0) | (28) | (816) | View Plans | ||
| HughesNet | (0) | (1) |  (25) | View Plans | ||
| Viasat | (0) | (1) |  (12) | View Plans | ||
| XFINITY | (0) | (211) | (2379) | View Plans | ||
| EarthLink | (0) | (2) | (15) | View Plans | ||
| Unwired | (0) | (1) | (1) | View Plans | ||
| AT&T | (0) | (119) | (1051) | View Plans |
Customer Ratings for Internet Provider Speeds in Port Costa
Based on data reported by Port Costa ISPs to the FCC, the fastest speeds in the city are available through XFINITY from Comcast. The company offers speeds up to 1,200 Mbps in Port Costa. Therefore, the average customer can get up to 1,200 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 | Port Costa Speed | California Speed | National Speed | For Service | ||
|---|---|---|---|---|---|---|
| T-Mobile Home Internet | (0) | (27) | (342) | View Plans | ||
| XFINITY | (0) | (211) | (2379) | View Plans | ||
| Verizon | (0) | (28) | (816) | View Plans | ||
| HughesNet | (0) |  (1) | (25) | View Plans | ||
| Unwired | (0) | (1) | (1) | View Plans | ||
| Viasat | (0) | (1) | (12) | View Plans | ||
| AT&T | (0) | (119) | (1051) | View Plans | ||
| EarthLink | (0) | (2) | (15) | View Plans |
Who is the Cheapest Internet Provider in Port Costa?
Of the providers in Port Costa, customers rate T-Mobile Home Internet the best for price. Data comes from customers rating their satisfaction with pricing: in Port Costa where enough of them have reviewed a provider, otherwise across California or the country. This feedback is valuable because it considers price changes and whether the speeds paid for are worth it.
T-Mobile Home Internet is rated 4.26 out of 5 for price, which is higher than the average across all internet providers in the country. Verizon is rated second for affordability, with an average price rating of 3.75 out of 5.
The table below shows how customers in Port Costa, California, and the United States rated the affordability of their internet service.
Rated Affordability in Port Costa
| ISP / Tech Type | Port Costa Affordability | California Affordability | National Affordability | For Service | ||
|---|---|---|---|---|---|---|
| T-Mobile Home Internet | (0) |  (27) | (342) | View Plans | ||
| Verizon | (0) | (28) | (816) | View Plans | ||
| HughesNet | (0) | (1) | (25) | View Plans | ||
| Viasat | (0) | (1) | (12) | View Plans | ||
| Unwired | (0) | (1) | (1) | View Plans | ||
| EarthLink | (0) | (2) | (15) | View Plans | ||
| AT&T | (0) | (119) | (1051) | View Plans | ||
| XFINITY | (0) | (211) | (2379) | View Plans |
Customer Reviews for Internet Service Providers in California
Customer Reviews
Steve
ting Fiber
November 13, 2026 Slow, 1/10th the speed they advertised
Robert
Verizon Fixed Wireless
November 10, 2026 Was cut off with .out notice due to upgrade and was not provided connection to upgrade from the same location (tower). Causing further problems in service and added cost.
ISPReports User
AT&T DSL
November 08, 2026 Lousy
ISPReports User
Fidium
November 08, 2026 Vernice
Frontier Fiber
November 01, 2026 Horrible this is horrible. My internet has been down for two days in a half. Never again
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Which ISP Should You Choose in Port Costa?
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 Port Costa is T-Mobile Home Internet.
- The fastest internet provider should be XFINITY from Comcast. 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 Port Costa is T-Mobile Home Internet.
- Viasat, HughesNet, EarthLink, and AT&T has the broadest coverage in Port Costa, available to 93.4% 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.