In San Mateo there are 4 residential Fiber providers covering 90.21% of the city. The average home can get speeds up to 5,246 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 Fiber internet providers in San Mateo, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in San Mateo, CA please click below.
San Mateo, CA Availability Maps
Fiber Internet Service Providers in San Mateo
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 San Mateo are not shown.
San Mateo 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 San Mateo is fiber internet available?
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Fiber is available in 90.21% of San Mateo. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is AT&T. Call one of the companies with service in San Mateo above to see who has service at your home.
How fast is fiber internet in San Mateo?
The map below shows maximum fiber internet speeds by area in San Mateo.
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The average San Mateo home can get up to 5,246 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 25,000 Mbps, which less than 1% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 13.13% of homes can only purchase plans up to 1,000 Mbps. See the internet provider details below for info about their speed and coverage in San Mateo.
Fiber internet speeds tend to be faster in the south parts of San Mateo, and slower in the northwest areas of the city.
Is fiber the fastest internet I can get in San Mateo?
The fastest internet for you may vary based on where in San Mateo you live. In general, cable competes most often with fiber in the city.
- Fiber is the fastest internet type for 76.44% of San Mateo homes.
- Cable is fastest for 23.23% of the city.
- 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 San Mateo homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in San Mateo, along with details on where in San Mateo and at what speeds.
EarthLink Fiber in San Mateo, CA
EarthLink fiber coverage
About 85.32%, or 91,473 people, have EarthLink fiber internet available to them in the city. The company covers the entire San Mateo area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Mateo.
EarthLink fiber download speeds
EarthLink is above average when comparing download speeds to all other internet providers in San Mateo. Versus other fiber providers in the area, EarthLink fiber is below average. There are 2 different maximum speeds throughout San Mateo. The fastest plan anyone in San Mateo can order from EarthLink goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for San Mateo customers is up to 4,484 Mbps.
Show all download speeds
- 87.1% up to 5,000.0 Mbps
- 12.9% up to 1,000.0 Mbps
EarthLink fiber upload speeds
In San Mateo download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is above average where upload speeds are concerned, and below average compared to other San Mateo fiber providers. EarthLink offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in San Mateo is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, EarthLink customers can get speeds up to 4,484 Mbps.
Show all upload speeds
- 87.1% up to 5,000.0 Mbps
- 12.9% up to 1,000.0 Mbps
AT&T Fiber in San Mateo, CA
AT&T fiber coverage
About 85.32%, or 91,473 people, have AT&T fiber internet available to them in the city. The company covers the entire San Mateo area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Mateo.
AT&T fiber download speeds
AT&T is above average when comparing download speeds to all other internet providers in San Mateo. Versus other fiber providers in the area, AT&T fiber is below average. There are 2 different maximum speeds throughout San Mateo. The fastest plan anyone in San Mateo can order from AT&T goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for San Mateo customers is up to 4,484 Mbps.
Show all download speeds
- 87.1% up to 5,000.0 Mbps
- 12.9% up to 1,000.0 Mbps
AT&T fiber upload speeds
In San Mateo download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is above average where upload speeds are concerned, and below average compared to other San Mateo fiber providers. AT&T offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in San Mateo is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, AT&T customers can get speeds up to 4,484 Mbps.
Show all upload speeds
- 87.1% up to 5,000.0 Mbps
- 12.9% up to 1,000.0 Mbps
Sonic Fiber in San Mateo, CA
Sonic fiber coverage
About 43.10%, or 46,207 people, have Sonic fiber internet available to them in the city. The company covers the northwest, central, south, southeast, north, west, and southwest San Mateo area. Sonic is a large internet service provider internet service providers in the US, with internet service available in some of San Mateo.
Sonic fiber download speeds
Sonic is above average when comparing download speeds to all other internet providers in San Mateo. Versus other fiber providers in the area, Sonic fiber is below average. There are 2 different maximum speeds throughout San Mateo. The fastest plan anyone in San Mateo can order from Sonic goes up to 10,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for San Mateo customers is up to 4,104 Mbps.
Show all download speeds
- 34.5% up to 10,000.0 Mbps
- 65.5% up to 1,000.0 Mbps
Sonic fiber upload speeds
In San Mateo download speeds tend to be equal to than upload speeds for Sonic fiber. Compared to other ISPs, Sonic is above average where upload speeds are concerned, and below average compared to other San Mateo fiber providers. Sonic offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in San Mateo is up to 10,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, Sonic customers can get speeds up to 4,104 Mbps.
Show all upload speeds
- 34.5% up to 10,000.0 Mbps
- 65.5% up to 1,000.0 Mbps
Astound Broadband Fiber in San Mateo, CA
Astound Broadband fiber coverage
About 5.98%, or 6,410 people, have Astound Broadband fiber internet available to them in the city. The company covers the east, central, southeast, west, north, northwest, and south San Mateo area. Astound Broadband is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of San Mateo.
Astound Broadband fiber download speeds
Astound Broadband is below average when comparing download speeds to all other internet providers in San Mateo. Versus other fiber providers in the area, Astound Broadband fiber is the slowest. There are no different maximum speeds throughout San Mateo. The fastest plan anyone in San Mateo can order from Astound Broadband goes up to 1,500 Mbps, and all San Mateo customers can get this speed.
Show all download speeds
- 100.0% up to 1,500.0 Mbps
Astound Broadband fiber upload speeds
In San Mateo download speeds tend to be equal to than upload speeds for Astound Broadband fiber. Compared to other ISPs, Astound Broadband is below average where upload speeds are concerned, and below average compared to other San Mateo fiber providers. Astound Broadband offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in San Mateo is up to 1,500 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,500.0 Mbps
San Mateo Fiber by Area
This information is most helpful to those looking for homes or considering moving to San Mateo or any of the areas nearby.
How does fiber internet in San Mateo compare to the rest of California?
Fiber internet speeds in San Mateo are much faster versus the average speeds in California: 0.00 Mbps in California versus 5,246 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in California is 0.00% versus 90.21% in San Mateo.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around San Mateo are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber internet look like in other cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- Hillsborough, CA: less fiber coverage, slower speeds
- Foster City, CA: less fiber coverage, slower speeds
- Highlands-Baywood Park, CA: more fiber coverage, slower speeds
- Belmont, CA: more fiber coverage, faster speeds
- Burlingame, CA: less fiber coverage, slower speeds
- San Carlos, CA: more fiber coverage, slower speeds
- Millbrae, CA: less fiber coverage, slower speeds
- Redwood City, CA: less fiber coverage, faster speeds
- North Fair Oaks, CA: more fiber coverage, faster speeds
- San Bruno, CA: more fiber coverage, slower speeds
Cities with Similar Populations
- Carlsbad, CA: less fiber coverage, slower speeds
- Canton, MI: less fiber coverage, slower speeds
- Canton, GA: less fiber coverage, slower speeds
- Castle Rock, CO: less fiber coverage, slower speeds
- Cary, NC: more fiber coverage, faster speeds
- Canyon Country, CA: less fiber coverage, slower speeds
- Cape Coral, FL: more fiber coverage, faster speeds
- Chattanooga, TN: more fiber coverage, faster speeds
- Cedar Rapids, IA: less fiber coverage, slower speeds
- Cheektowaga, NY: more fiber coverage, slower speeds