10 Best Internet Providers in Marin County, CA
Find internet availability by address in Marin County, CA
Jump to: Best Internet Provider | Availability Maps | Customer Reviews | Marin County ISP Report Card | Business Internet in Marin County
| Marin County ISP Report Card | B | |
| Download Speed for Most Households | 3,601 Mbps | |
| Number of Internet Service Providers | 10 | |
| Real Marin County Customer Ratings | 2 |
This page reflects the most recent FCC update from January 06, 2026, based on the Broadband Data Collection as of June 30, 2025.
This page reflects the most recent FCC update from January 06, 2026, based on the Broadband Data Collection as of June 30, 2025.
Marin County has 10 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 Marin County.
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Marin County has 10 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 Marin County.
Compare Providers Ranked by Coverage, Speed, and Customer Ratings
XFINITY
Connection
Customer Rating
Cable
EarthLink
Connection
Customer Rating
Fiber
DSL
Fixed Wireless
AT&T
Connection
Customer Rating
Fiber
DSL
Fixed Wireless
Frontier
Connection
Customer Rating
Fiber
DSL
Above are the top 4 providers in Marin County, CA for most people based on high speed internet coverage, speeds, and customer reviews. Click below to see all providers in your county.
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 Marin County ratings may vary and are shown below.
Who is the Best Internet Provider in Marin County, CA?
Sonic is the highest-rated internet provider in Marin County based on 404 California customer reviews, and Sonic has the highest rating nationwide. The provider information above and the information immediately below can help you decide. Compare provider ratings and review counts above. The chart and table below show average customer ratings from customers in Marin County, California, and customers throughout the country.
Top Rated Internet Providers in Marin County
Local, State, and National Ratings for all Marin County Internet Providers
| ISP / Tech Type | Marin County Overall | California Overall | National Overall | For Service | ||
|---|---|---|---|---|---|---|
| XFINITY | (2) | (193) | (2164) | View Plans | ||
| Sonic | (0) | (11) | (11) | View Plans | ||
| T-Mobile Home Internet | (0) | (22) | (284) | View Plans | ||
| Frontier | (0) | (42) | (143) | View Plans | ||
| Verizon | (0) | (24) | (723) | View Plans | ||
| AT&T | (0) | (107) | (924) | View Plans | ||
| HughesNet | (0) | (1) | (18) | View Plans | ||
| Viasat | (0) | (1) | (11) | View Plans | ||
| EarthLink | (0) | (2) | (12) | View Plans | ||
| Unwired | (0) | (1) | (1) | View Plans | ||
| Horizon Cable TV | (0) | (0) | (0) | View Plans | ||
| Etheric Networks | (0) | (0) | (0) | View Plans |
Based on 404 reviews from California internet customers, Sonic is the best internet service provider for Marin County residents. Sonic was rated at an average of 4.36 out of 5 in our report for overall customer satisfaction. T-Mobile Home Internet wins for second-place in California, with 4.00 out of 5 stars and 78.7% coverage in Marin County.
At a national level, based on 4291 national reviews for any of the providers listed above, Sonic is rated higher than any other provider, with a rating of 4.27 out of 5.
Which Providers are Available at my Home in Marin County?
a different provider.

Internet Availability Key
Speeds and coverage vary within the county, and sometimes even from block to block. The map shows speeds per provider and where each provider is available.
Who is the Fastest Internet Provider in Marin County?
Based on both FCC data and unbiased customer ratings in Marin County, the fastest internet in the county comes from Sonic.
Data Reported to FCC by ISPs: Average Maximum Available in Marin County
| ISP / Tech Type | Max Advertised Speed | ||
|---|---|---|---|
| Sonic | 10,000 Mbps | ||
| AT&T | 5,000 Mbps | ||
| EarthLink | 5,000 Mbps | ||
| Frontier Communications | 2,000 Mbps | ||
| XFINITY from Comcast | 2,000 Mbps | ||
| Horizon Cable TV | 300 Mbps | ||
| Verizon | 300 Mbps | ||
| Unwired | 300 Mbps | ||
| Etheric Networks | 250 Mbps | ||
| T-Mobile Home Internet | 100 Mbps | ||
| Viasat | 100 Mbps | ||
| HughesNet | 25 Mbps |
Customer Ratings for Internet Provider Speeds in Marin County
| ISP / Tech Type | Marin County Speed | California Speed | National Speed | For Service | ||
|---|---|---|---|---|---|---|
| XFINITY | (2) | (193) | (2164) | View Plans | ||
| Sonic | (0) | (11) | (11) | View Plans | ||
| Frontier | (0) | (42) | (143) | View Plans | ||
| Verizon | (0) | (24) | (723) | View Plans | ||
| T-Mobile Home Internet | (0) | (22) | (284) | View Plans | ||
| AT&T | (0) | (107) | (924) | View Plans | ||
| HughesNet | (0) | (1) | (18) | View Plans | ||
| Unwired | (0) | (1) | (1) | View Plans | ||
| Viasat | (0) | (1) | (11) | View Plans | ||
| EarthLink | (0) | (2) | (12) | View Plans | ||
| Horizon Cable TV | (0) | (0) | (0) | View Plans | ||
| Etheric Networks | (0) | (0) | (0) | View Plans |
Based on data reported by Marin County ISPs to the FCC, the fastest speeds in the county are available through Sonic. The company offers speeds up to 10,000 Mbps in Marin County. Therefore, the average customer can get up to 10,000 Mbps if they're willing to purchase the fastest subscription tier available at their homes.
However, actual customers in the county rated their satisfaction with internet speed highest with Sonic. This indicates Sonic reliably delivers speeds expected by the customer based on the plan they are paying for.
Who is the Cheapest Internet Provider in Marin County?
California customers rate T-Mobile Home Internet as the cheapest internet service provider in state. Data comes from customers in the state rating their satisfaction with pricing. This feedback is valuable because it considers price changes and whether the speeds paid for are worth it.
T-Mobile Home Internet received a local rating of 4.18 out of 5, which is about average for the average across all internet providers in the country. Sonic is rated in second place for affordability by the company’s Marin County customers with an average price rating of 4.09 out of 5.
The chart and graph below show how customers in Marin County, California, and the United States rated the affordability of their internet service.
Rated Affordability in Marin County
| ISP / Tech Type | Marin County Affordability | California Affordability | National Affordability | For Service | ||
|---|---|---|---|---|---|---|
| XFINITY | (2) | (193) | (2164) | View Plans | ||
| T-Mobile Home Internet | (0) | (22) | (284) | View Plans | ||
| Sonic | (0) | (11) | (11) | View Plans | ||
| Verizon | (0) | (24) | (723) | View Plans | ||
| Frontier | (0) | (42) | (143) | View Plans | ||
| AT&T | (0) | (107) | (924) | View Plans | ||
| HughesNet | (0) | (1) | (18) | View Plans | ||
| Viasat | (0) | (1) | (11) | View Plans | ||
| EarthLink | (0) | (2) | (12) | View Plans | ||
| Unwired | (0) | (1) | (1) | View Plans | ||
| Horizon Cable TV | (0) | (0) | (0) | View Plans | ||
| Etheric Networks | (0) | (0) | (0) | View Plans |
Marin County Internet Health Assessment
ISP Reports evaluates the technological infrastructure across the United States. This includes assessing a grade for ISP providers and infrastructure in the county and setting an index number for the digital connectivity of its residents. You can view the ISP Report Card and the Digital Connectivity Index for Marin County below, including the metrics used and how Marin County compares to the rest of California and nation.
| Metric
(hover for details)
|
Marin County | California | USA | ||
|---|---|---|---|---|---|
| Fiber Availability Percent The percentage of households in Marin County that have a Fiber internet connection available to their home. | 58.15% | 56.12% | 67.25% | ||
| Average Download SpeedThe maximum download speed most households can get on average. This is measured by availability in a block group and weighted by the population in that area. | 3,601 Mbps | 3,631 Mbps | 3,293 Mbps | ||
| Provider CountThe number of providers available for most people. This is a weighted average by block rather than a total for Marin County. | 7.2 | 7.4 | 6.8 |
| Average Household SizeA larger household size in a county indicates that there will be a greater need for bandwidth due to simultaneous usage, multiple devices, and network congestion. | 2.6 | 3.0 | 2.7 | ||
| Work From Home PercentA higher percent of the population working from home indicates bandwidth requirements being more widely needed rather than consolidated to commercial portions of the city. | 28% | 15% | 14% | ||
| Households with DevicesA higher percentage of households with computing devices in the home indicates a higher level of infrastructure needed to support those households. | 98% | 96% | 95% | ||
| Households with InternetA higher percentage of households with internet indicates a higher need for usage and connectivity in people’s daily lives. | 95% | 93% | 90% | ||
| Households with BroadbandA higher percentage of households with a broadband connection (defined as speeds above 25 Mbps) indicates heavier usage needs within these households. | 86% | 78% | 75% | ||
| Broadband Usage vs. AvailabilityThis measures what percentage of households who have a broadband connection to their home actually have an active subscription to that service. | 87% | 79% | 76% |
Our demographic data is sourced from the latest 5-year release of the American Community Survey by the US Census Bureau.
Marin County ISP Report Card & Digital Connectivity Index
The ISP Report Card in Marin County is B, which is much better than other counties. The local demand for broadband internet connectivity in Marin County is high with a score of 85 / 100 in our Digital Connectivity Index. This means that internet service providers operating in Marin County have done a great job meeting the needs of its residents.
The Marin County ISP Report Card evaluates the county on availability and speed metrics compared to other counties in the United States. ISP Infrastructure can vary greatly and on its own isn’t a perfect measure of what a county needs. Please see our ISP Report Card along with the Digital Connectivity Index above to evaluate how well the connectivity demand is met by the existing infrastructure.
95% of Marin County households have an internet connection despite having 99.11% availability. 86% of households have fiber, cable, or DSL, 4% have satellite, 0% are still on dial-up, and 1% of households have internet but don’t pay for a subscription because it’s subsidized by the Affordable Connectivity Program.
As you can see in the table above, while 86% of households have a broadband connection such as fiber, cable or DSL available to their home, 87% subscribe to it. A very large amount of Marin County residents are taking advantage of the available internet infrastructure.
For more details, please visit our ISP Report Card and Digital Connectivity Index pages.
How do Neighboring Counties Compare to Marin County?
- ISP Report Card: B+
- Digital Connectivity Index: 87 / 100
- ISP Report Card: B
- Digital Connectivity Index: 74 / 100
- ISP Report Card: C
- Digital Connectivity Index: 47 / 100
- ISP Report Card: C-
- Digital Connectivity Index: 50 / 100
- ISP Report Card: C
- Digital Connectivity Index: 48 / 100
- ISP Report Card: D+
- Digital Connectivity Index: 66 / 100
- ISP Report Card: C
- Digital Connectivity Index: 45 / 100
- ISP Report Card: C+
- Digital Connectivity Index: 46 / 100
- ISP Report Card: C
- Digital Connectivity Index: 26 / 100
How Much Speed does a Marin County Household Need?
Higher speed is typically preferred, but that comes at a higher price. The average size of a household in Marin County is 2.6, which is smaller than the California average of 3.0 and smaller than the national average of 2.7. Marin County's average household income is $157,897 which is much higher than the California average of $108,618 and much higher than the national average of $90,606. Homes with more people living in them and with higher incomes tend to indicate more devices being used more often.
Marin County also has 15% of its population enrolled in school between the 6th grade and college level, this is lower than the California average of 17%. Additionally, 28% of residents work from home, which is higher than the 15% of residents in California who work from home. This and other factors you can see above show us that the community of Marin County has a very high need for internet connectivity and speeds.
Compared to the rest of the country, Marin County households are much more technology-engaged. 98% of households have some sort of computing device, 94% have desktops or laptops in the home, and 94% have smartphones. To see what speeds you are currently getting, please visit our internet speed test tool.
Which Fiber Internet Providers are Available in Marin County?
EarthLink Fiber in Marin County, CA
EarthLink offers Fiber service to 42.3% of Marin County homes. Across the county, EarthLink Fiber has speeds up to 4,424 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 Marin County from EarthLink in terms of customer satisfaction.
AT&T Fiber in Marin County, CA
AT&T offers Fiber service to 42.3% of Marin County homes. Across the county, AT&T Fiber has speeds up to 4,424 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 higher than other types of internet service available in Marin County from AT&T in terms of customer satisfaction.
Frontier Fiber in Marin County, CA
Frontier Communications offers Fiber service to 13.6% of Marin County homes. Across the county, Frontier Fiber has speeds up to 2,000 Mbps
Sonic Fiber in Marin County, CA
Sonic offers Fiber service to 9.5% of Marin County homes. Across the county, Sonic Fiber is the only type of service available from the company, with speeds up to 10,000 Mbps
Which Cable Internet Providers are Available in Marin County?
XFINITY Cable in Marin County, CA
XFINITY from Comcast offers Cable service to 96.4% of Marin County homes. Across the county, XFINITY Cable is the only type of service available from the company, with speeds up to 1,892 Mbps, with speeds from 1,200 Mpbs up to 2,000 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 35 and as high as 250, with an average of 221 Mbps throughout the county.
Horizon Cable TV Cable in Marin County, CA
Horizon Cable TV offers Cable service to 1.1% of Marin County homes. Across the county, Horizon Cable TV Cable is the only type of service available from the company, with speeds up to 100 Mbps
Which DSL Internet Providers are Available in Marin County?
EarthLink DSL in Marin County, CA
EarthLink offers DSL service to 78.6% of Marin County homes. Across the county, EarthLink DSL has speeds up to 68 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 the same as other types of internet service available in Marin County from EarthLink in terms of customer satisfaction.
AT&T DSL in Marin County, CA
AT&T offers DSL service to 78.6% of Marin County homes. Across the county, AT&T DSL has speeds up to 68 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 Marin County from AT&T in terms of customer satisfaction.
Frontier DSL in Marin County, CA
Frontier Communications offers DSL service to 4.7% of Marin County homes. Across the county, Frontier DSL has speeds up to 17 Mbps, with speeds from 10 Mpbs up to 90 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 8.0, with an average of 1.3 Mbps throughout the county. Frontier DSL is rated lower than other types of internet service available in Marin County from Frontier in terms of customer satisfaction.
Which Fixed Wireless and LTE Internet Providers are Available in Marin County?
T-Mobile Home Internet Fixed Wireless in Marin County, CA
T-Mobile Home Internet offers Fixed Wireless service to 78.7% of Marin 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 78 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 15 Mbps throughout the county.
Unwired Fixed Wireless in Marin County, CA
Unwired offers Fixed Wireless service to 75.2% of Marin County homes. Across the county, Unwired Fixed Wireless is the only type of service available from the company, with speeds up to 300 Mbps
EarthLink Fixed Wireless in Marin County, CA
EarthLink offers Fixed Wireless service to 62.2% of Marin County homes. Across the county, EarthLink Fixed Wireless has speeds up to 41 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 6.6 Mbps throughout the county.
AT&T Fixed Wireless in Marin County, CA
AT&T offers Fixed Wireless service to 62.2% of Marin County homes. Across the county, AT&T Fixed Wireless has speeds up to 41 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 6.6 Mbps throughout the county.
Verizon Fixed Wireless in Marin County, CA
Verizon offers Fixed Wireless service to 60.1% of Marin County homes. Across the county, Verizon Fixed Wireless is the only type of service available from the company, with speeds up to 300 Mbps
Etheric Networks Fixed Wireless in Marin County, CA
Etheric Networks offers Fixed Wireless service to 6.9% of Marin County homes. Across the county, Etheric Networks Fixed Wireless is the only type of service available from the company, with speeds up to 250 Mbps
Which ISP Should You Choose in Marin 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 Marin County is Sonic.
- The fastest internet provider should be Sonic. Considering speed for the money and reliability in speeds, Sonic may be a better choice based on real-world local customer feedback.
- The most affordable internet provider in Marin County is T-Mobile Home Internet.
- XFINITY from Comcast, Viasat, and HughesNet has the broadest coverage in Marin County, and is most likely to cover your home. To find out exactly what's available at your home, please use our address search tool.
How does Marin County compare to other cities with a similar population?
To see how Marin County stacks up on the national level, it's useful to look at some other cities with similarly sized populations. Below you can see a list of these cities and how they compare to Marin County's B ISP Report Card and 85 / 100 Digital Connectivity Index.
- ISP Report Card: B
- Digital Connectivity Index: 61 / 100
- ISP Report Card: A-
- Digital Connectivity Index: 57 / 100
- ISP Report Card: C+
- Digital Connectivity Index: 70 / 100
- ISP Report Card: B+
- Digital Connectivity Index: 80 / 100
- ISP Report Card: B
- Digital Connectivity Index: 78 / 100
- ISP Report Card: B+
- Digital Connectivity Index: 72 / 100
- ISP Report Card: B
- Digital Connectivity Index: 57 / 100
- ISP Report Card: C
- Digital Connectivity Index: 49 / 100
- ISP Report Card: B+
- Digital Connectivity Index: 76 / 100
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