In Marin County there are 2 residential Cable providers covering 97.49% of the county. The average home can get speeds up to 1,872 Mbps. Note that we may have a financial relationship with some of the providers below. This does not influence rankings, and helps us provide high-quality detailed information for free.
This page contains all Cable internet providers in Marin County, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Marin County, CA please click below.
Marin County, CA Availability Maps
Cable Internet Service Providers in Marin County
Data updated 11/14/2025, based on FCC data from 12/31/2024. This is the most current data available as of .
To avoid wasting your time, providers with less than 1% coverage in Marin County are not shown.
Marin County Satellite TV & Internet Providers
DISH Satellite TV
DIRECTV Satellite TV
Not sure whether to choose Dish or DIRECTV? For most people most of the time we recommend DISH. But click here to learn more.
Viasat Satellite Internet
Where in Marin County is cable internet available?
Cable Internet Availability Key
Cable is available in 97.49% of Marin County. Areas in green have cable internet service, where areas in yellow or red may not. The most widely available provider is XFINITY. Call one of the companies with service in Marin County above to see who has service at your home.
How fast is cable internet in Marin County?
The map below shows maximum cable internet speeds by area in Marin County.
Cable Internet Speed Key
The average Marin County home can get up to 1,872 Mbps on their cable internet plan. The fastest cable download speed in the county is 2,000 Mbps, which 83.41% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 1.11% of homes can only purchase plans up to 100 Mbps. See the internet provider details below for info about their speed and coverage in Marin County.
Cable internet speeds tend to be faster in the northeast parts of Marin County, and slower in the southwest areas of the county.
Is cable the fastest internet I can get in Marin County?
The fastest internet for you may vary based on where in Marin County you live. In general, fiber competes most often with cable in the county.
- Fiber is the fastest internet type for 53.76% of Marin County homes.
- Cable is fastest for 44.46% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for less than 1% of Marin County homes.
Cable Providers in Depth
Below you'll find which TV and internet providers offer service in Marin County, along with details on where in Marin County and at what speeds.
XFINITY from Comcast Cable in Marin County, CA
XFINITY cable coverage
About 96.38%, or 252,819 people, have XFINITY cable internet available to them in the county. The company covers the entire Marin County area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in most of Marin County.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in Marin County. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout Marin County. The fastest plan anyone in Marin County can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,200 Mbps, and the county-wide average maximum speed for Marin County customers is up to 1,892 Mbps.
Show all download speeds
- 86.5% up to 2,000.0 Mbps
- 13.5% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In Marin County download speeds tend to be faster than than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the fastest compared to other Marin County cable providers. XFINITY offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Marin County is up to 250 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 221 Mbps.
Show all upload speeds
- 86.5% up to 250.0 Mbps
- 13.5% up to 35.0 Mbps
Horizon Cable TV Cable in Marin County, CA
Horizon Cable TV cable coverage
About 1.13%, or 2,974 people, have Horizon Cable TV cable internet available to them in the county. The company covers the northwest and southwest Marin County area. Horizon Cable TV is a small internet service provider internet service providers in the US, with internet service available in a very small piece of Marin County.
Horizon Cable TV cable download speeds
Horizon Cable TV is below average when comparing download speeds to all other internet providers in Marin County. Versus other cable providers in the area, Horizon Cable TV cable is the slowest. There are no different maximum speeds throughout Marin County. The fastest plan anyone in Marin County can order from Horizon Cable TV goes up to 100 Mbps, and all Marin County customers can get this speed.
Show all download speeds
- 100.0% up to 100.0 Mbps
Horizon Cable TV cable upload speeds
In Marin County download speeds tend to be faster than than upload speeds for Horizon Cable TV cable. Compared to other ISPs, Horizon Cable TV is below average where upload speeds are concerned, and the slowest compared to other Marin County cable providers. Horizon Cable TV offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Marin County is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
Marin County Cable by Area
This information is most helpful to those looking for homes or considering moving to Marin County or any of the areas nearby.
How does cable internet in Marin County compare to the rest of California?
Cable internet speeds in Marin County are much faster versus the average speeds in California: 0.00 Mbps in California versus 1,872 Mbps in the county. The state has similar cable availability compared to the county. Average cable coverage in California is 0.00% versus 97.49% in Marin County.
What zip codes have cable internet?
Cable internet coverage varies by zip code and neighborhood. Some examples in or around Marin County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does cable internet look like in other counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Contra Costa County, CA: more cable coverage, slower speeds
- San Joaquin County, CA: less cable coverage, slower speeds
- Tuolumne County, CA: less cable coverage, slower speeds
- San Miguel County, CO: less cable coverage, slower speeds
- Otero County, CO: less cable coverage, slower speeds
- Prowers County, CO: less cable coverage, slower speeds
- Finney County, KS: less cable coverage, faster speeds
- Hodgeman County, KS: less cable coverage, slower speeds
- Edwards County, KS: less cable coverage, faster speeds
- Reno County, KS: less cable coverage, faster speeds
Counties with Similar Populations
- Yuma County, AZ: less cable coverage, slower speeds
- Harrison County, MS: less cable coverage, slower speeds
- Hawaii County, HI: less cable coverage, slower speeds
- Clay County, FL: less cable coverage, slower speeds
- Hays County, TX: less cable coverage, slower speeds
- Clermont County, OH: more cable coverage, slower speeds
- St. Joseph County, IN: less cable coverage, slower speeds
- St. Louis County, MN: less cable coverage, slower speeds
- Hall County, GA: less cable coverage, slower speeds
- Boulder County, CO: less cable coverage, slower speeds