Internet providers in Gaithersburg, Maryland 20899
ZIP code 20899 is in Gaithersburg, Montgomery County, Maryland. Compare the major providers below, then check availability for your address.
Internet in Gaithersburg 20899: local snapshot
About 53% of the 89 households in 20899 have a broadband subscription, 39 points below the Maryland average of 91%. That ranks 20899#436 of 437 ZIP codes in Maryland for broadband adoption. Roughly 47% of households have no internet at all, which can point to limited wired options or affordability challenges here.
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2023). These figures describe the area, not the providers available at your address.
Compare internet providers in Gaithersburg, Maryland
Share of residential locations in Gaithersburg where each provider reports service, from the FCC National Broadband Map (data as of December 31, 2025). Availability depends on your exact address.
| # | Provider | Technology (varies by address) | Locations covered | |
|---|---|---|---|---|
| 1 | Xfinity | Cable | 98% | |
| 2 | Verizon | Fiber, Fixed wireless | 91% | Check availability |
| 3 | T-Mobile Home Internet | Fixed wireless | 82% | |
| 4 | AT&T | Fiber, DSL, Fixed wireless | 61% | Check availability |
| 5 | Astound Broadband | Fiber, Cable | 35% | |
| 6 | Montgomery County, Maryland | Fiber | <1% |
Satellite internet
| 1 | HughesNet | Satellite | 99%+ | |
| 2 | Viasat | Satellite | 99%+ | |
| 3 | Starlink | Satellite | 99%+ |
Satellite service is available at nearly every address but typically has higher latency than wired options.
Provider-reported coverage does not guarantee service or speeds at a specific address. Some "Check availability" links are affiliate links; we may earn a commission at no cost to you. How we make money.
What technologies are available in Gaithersburg?
Fiber is widely available: about 69% of locations in Gaithersburg can get it. Gigabit-class service (1,000 Mbps down) is reported for about 91% of locations. Fixed wireless home internet is reported for about 82% of locations.
FCC National Broadband Map, data as of December 31, 2025: share of residential locations in Gaithersburg that providers report they can serve. City-level figures, not your address.
What to know about internet in Gaithersburg 20899
Xfinity reports service to the most residential locations in Gaithersburg, about 98%. 4 providers report coverage of at least half of locations (Xfinity, Verizon, T-Mobile Home Internet, and AT&T), so the market looks competitive. T-Mobile Home Internet offers fixed wireless home internet, an option if you prefer no cable or fiber installation.
Broadband adoption in 20899 (53%) is lower than the Gaithersburg average of 96%. By median household income, 20899 ranks 5 of 5 ZIP codes in Gaithersburg. The median age of residents is 70, an older-skewing area where reliability and simple plans tend to matter most.
Frequently asked questions
Is fiber internet available in Gaithersburg?
Yes, in part. About 69% of residential locations in Gaithersburg can get fiber, 98% can get cable, and about 91% can get gigabit-class speeds, per FCC data. Availability depends on your exact address.
Which internet provider has the widest coverage in Gaithersburg?
Xfinity reports service to about 98% of residential locations in Gaithersburg, the most of any provider, per FCC data. Availability still depends on your address.
How many internet providers serve Gaithersburg?
5 providers report service to at least 2% of locations in Gaithersburg, and 4 cover at least half. Satellite (HughesNet, Viasat, Starlink) is also available nearly everywhere.
What is the difference between fiber, cable and DSL?
Fiber offers the fastest and most consistent speeds, cable is widely available with high download speeds, and DSL runs over phone lines and is usually slower. See our guide for details.
What internet speed do I need in Gaithersburg 20899?
Most households are well served by 100–300 Mbps. Heavy streaming, gaming or many connected devices may benefit from 500 Mbps or more.
Other ZIP codes in Gaithersburg
Internet providers near Gaithersburg
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