Best Internet in Marin, CA
1000 Mbps avg · 29 ZIP codes · 100% fiber · 10 providers/ZIP
Internet Providers in Marin
| Provider | ZIP Codes Served | % of Area |
|---|---|---|
| At&T California | 29 | 100% |
| Charter Communications INC | 29 | 100% |
| T-Mobile | 29 | 100% |
| Comcast | 29 | 100% |
| unWired Broadband INC | 29 | 100% |
| Verizon California INC Ca Gte | 29 | 100% |
| Etheric Networks, INC. | 29 | 100% |
| Cal.net INC. | 29 | 100% |
ZIP Codes in Marin
See how your connection compares to the 1000 Mbps average in Marin.
Frequently Asked Questions
What is the average internet speed in Marin, CA?
Marin, California has an average maximum download speed of 1000 Mbps across 29 ZIP codes. The fastest available speed is 1000 Mbps. 100% of ZIP codes have fiber internet.
Who are the best internet providers in Marin?
The most widely available providers in Marin are At&T California (29 ZIPs), Charter Communications INC (29 ZIPs), T-Mobile (29 ZIPs). Check individual ZIP codes for exact availability at your address.
Is fiber internet available in Marin?
Yes, fiber internet is available in 100% of Marin's ZIP codes. Fiber coverage is good in this area. Search your specific ZIP code for exact fiber availability.
How does Marin compare to the rest of California?
Marin has an average Broadband Grade of A (86/100). The Marin area averages 10 providers per ZIP code with 100% fiber access. Check the California overview for statewide comparison.
this entity is one of the data points covered by this site’s U.S. internet availability and broadband speed dataset. The detail above comes directly from the FCC Broadband Data Collection (BDC); the context that follows situates the headline numbers against the broader distribution across U.S. ZIPs, counties, and states.
The methodology behind every numeric value on this page is publicly documented on the the FCC Broadband Data Collection (BDC) portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. ZIPs, counties, and states. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: FCC Broadband Data Collection, 2026.