Internet in San Diego at a glance
San Diego, California has 621,901 residential broadband-serviceable locations. Fiber reaches 40.2% of them at 100/20 Mbps or faster; cable reaches 89.7%. Gigabit service is available to 68.2% across all technologies.
- San Diego has 621,901 residential broadband-serviceable locations, per FCC filings as of December 31, 2025.
- It ranks #23 of 29 markets FiberNear tracks for fiber availability, against a median of 64.2%.
- Cable reaches 49.5% more of San Diego than fiber does — the gap most people are surprised by.
- Over fiber specifically, gigabit reaches 37.7%; across all technologies it reaches 68.2%.
- FiberNear tracks 1 fiber network operating in San Diego, alongside 2 major non-fiber providers, and coverage varies street by street — a citywide figure will not tell you what reaches a specific address.
Source: FCC Broadband Data Collection, residential fixed broadband, as of December 31, 2025. Figures are advertised availability self-reported by providers, not measured speeds.
Availability figures: FCC Broadband Data Collection, as of December 31, 2025. Page updated August 15, 2026.
San Diego, California is a large Southern California market where cable still reaches more than twice as many homes as fiber. Because fiber is built out street by street, the useful question isn't "who offers service in San Diego?" — it's "who can actually install it at my address?" That is what FiberNear checks for you.
What's actually available in San Diego
Each figure is the share of San Diego's residential broadband-serviceable locations where at least one provider reports service at that speed or better. Read down a column to compare technologies at the same speed tier.
| Technology | 25/3 Mbps | 100/20 Mbps | 250/25 Mbps | 1 Gbps |
|---|---|---|---|---|
| Fiber to the home | 40.2% | 40.2% | 40.2% | 37.7% |
| Cable | 89.7% | 89.7% | 89.7% | 46.9% |
| Fixed wireless | 81.9% | 65.5% | 26.5% | 4.4% |
| DSL / copper | 52.6% | 16.8% | 0.0% | 0.0% |
| Any technology | 100.0% | 100.0% | 100.0% | 68.2% |
Source: FCC Broadband Data Collection, residential fixed broadband, as of December 31, 2025. Figures are advertised availability self-reported by providers, not measured speeds.
How San Diego compares
Across the 29 metros FiberNear tracks, the median fiber availability is 64.2% at 100/20 Mbps. San Diego sits at 40.2%, which ranks #23 of 29 — San Diego has thinner fiber coverage than a typical market in this set, which makes checking your specific address more worthwhile, not less.
Internet providers in San Diego
These are the major networks active in and around San Diego — fiber first, plus the cable and wireless operators that reach a large share of the market. Each card names the connection type, because that is the difference that actually matters. Coverage varies by neighborhood and address, so use the checker to confirm which of them reach your home.
Which providers operate in each market is FiberNear's own editorial assessment, not an FCC figure. The FCC's public filings report how much fiber reaches a city, but not which brand it belongs to.
AT&T Fiber
100% fiber-optic; plans commonly range from 300 Mbps up to 5 Gbps where available. Known for symmetrical speeds and no annual contract on most fiber plans.
Spectrum
Hybrid fiber-coaxial cable, with fiber run to some business and new-build addresses; plans commonly range from 100 Mbps up to 1 Gbps where available. Known for very wide availability and no data caps on residential plans.
Cox Communications
Hybrid fiber-coaxial cable; plans commonly range from 100 Mbps up to 2 Gbps where available. Known for a strong position in Southwest metros where fiber arrived late.
See if fiber is available at your address
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Check My San Diego Address →Fiber vs cable in San Diego
Cable currently reaches more of San Diego than fiber does — 89.7% of locations versus 40.2% at 100/20 Mbps. But coverage and quality are different questions. The gap shows up at the top of the range: 37.7% of San Diego can get gigabit over fiber, compared with 46.9% over cable.
Where it is available, fiber generally outperforms cable and DSL on speed consistency, upload performance and latency — which matters most for video calls, cloud backups, and a household with several people online at once. Actual speeds, pricing and availability are set and confirmed by each provider. How fiber availability works →
Looking for business internet in San Diego?
Everything above is the residential figure. The FCC reports business availability separately, and in San Diego fiber reaches 41.1% of business locations against 40.2% of homes — so a street with fiber in it does not settle the question for a commercial premises. Business fiber in San Diego →
Common questions about internet in San Diego
Is fiber internet available in San Diego?
What percentage of San Diego can get gigabit internet?
Is cable or fiber more widely available in San Diego?
How do I find out which internet providers serve my exact address in San Diego?
Is FiberNear an internet provider?
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