In Darien there are 3 residential Fiber providers covering 99.94% of the city. The average home can get speeds up to 7,981 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 Darien, CT.
To see availability maps for all providers including fiber, cable, DSL, and more in Darien, CT please click below.
Fiber Internet Service Providers in Darien
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 Darien are not shown.
Darien 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 Darien is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 99.94% of Darien. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Optimum. Call one of the companies with service in Darien above to see who has service at your home.
How fast is fiber internet in Darien?
The map below shows maximum fiber internet speeds by area in Darien.
Fiber Internet Speed Key
The average Darien home can get up to 7,981 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 8,000 Mbps, which 98.09% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 1.86% of homes can only purchase plans up to 7,000 Mbps. See the internet provider details below for info about their speed and coverage in Darien.
Fiber internet speeds tend to be faster in the southwest parts of Darien, and slower in the west areas of the city.
Is fiber the fastest internet I can get in Darien?
The fastest internet for you may vary based on where in Darien you live. In general, fixed wireless competes most often with fiber in the city.
- Fiber is the fastest internet type for 99.94% of Darien homes.
- Cable is fastest for less than 1% 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 Darien homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Darien, along with details on where in Darien and at what speeds.
Frontier Communications Fiber in Darien, CT
Frontier fiber coverage
About 99.13%, or 21,312 people, have Frontier fiber internet available to them in the city. The company covers the entire Darien area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in most of Darien.
Frontier Communications fiber download speeds
Frontier is above average when comparing download speeds to all other internet providers in Darien. Versus other fiber providers in the area, Frontier fiber is above average. There are no different maximum speeds throughout Darien. The fastest plan anyone in Darien can order from Frontier goes up to 7,000 Mbps, and all Darien customers can get this speed.
Show all download speeds
- 100.0% up to 7,000.0 Mbps
Frontier Communications fiber upload speeds
In Darien download speeds tend to be equal to than upload speeds for Frontier fiber. Compared to other ISPs, Frontier is above average where upload speeds are concerned, and above average compared to other Darien fiber providers. Frontier offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Darien is up to 7,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 7,000.0 Mbps
Optimum Fiber in Darien, CT
Optimum fiber coverage
About 98.09%, or 21,088 people, have Optimum fiber internet available to them in the city. The company covers the entire Darien area. Optimum is one of the largest internet service providers internet service providers in the US, with internet service available in most of Darien.
Optimum fiber download speeds
Optimum is the fastest when comparing download speeds to all other internet providers in Darien. Versus other fiber providers in the area, Optimum fiber is the fastest. There are no different maximum speeds throughout Darien. The fastest plan anyone in Darien can order from Optimum goes up to 8,000 Mbps, and all Darien customers can get this speed.
Show all download speeds
- 100.0% up to 8,000.0 Mbps
Optimum fiber upload speeds
In Darien download speeds tend to be equal to than upload speeds for Optimum fiber. Compared to other ISPs, Optimum is the fastest where upload speeds are concerned, and the fastest compared to other Darien fiber providers. Optimum offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Darien is up to 8,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 8,000.0 Mbps
XFINITY from Comcast Fiber in Darien, CT
XFINITY fiber coverage
About 4.93%, or 1,059 people, have XFINITY fiber internet available to them in the city. The company covers the northeast, southeast, east, and north Darien area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Darien.
XFINITY from Comcast fiber download speeds
XFINITY is below average when comparing download speeds to all other internet providers in Darien. Versus other fiber providers in the area, XFINITY fiber is the slowest. There are 2 different maximum speeds throughout Darien. The fastest plan anyone in Darien can order from XFINITY goes up to 1,200 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for Darien customers is up to 1,140 Mbps.
Show all download speeds
- 69.9% up to 1,200.0 Mbps
- 30.1% up to 1,000.0 Mbps
XFINITY from Comcast fiber upload speeds
In Darien download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the slowest compared to other Darien fiber providers. XFINITY 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 Darien is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 326 Mbps.
Show all upload speeds
- 30.1% up to 1,000.0 Mbps
- 69.9% up to 35.0 Mbps
Darien Fiber by Area
This information is most helpful to those looking for homes or considering moving to Darien or any of the areas nearby.
How does fiber internet in Darien compare to the rest of Connecticut?
Fiber internet speeds in Darien are much faster versus the average speeds in Connecticut: 0.00 Mbps in Connecticut versus 7,981 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in Connecticut is 0.00% versus 99.94% in Darien.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Darien 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
- Stamford, CT: less fiber coverage, faster speeds
- Norwalk, CT: less fiber coverage, slower speeds
- New Canaan, CT: less fiber coverage, faster speeds
- Old Greenwich, CT: more fiber coverage, faster speeds
- Riverside, CT: less fiber coverage, faster speeds
- Cos Cob, CT: less fiber coverage, slower speeds
- Westport, CT: less fiber coverage, faster speeds
- Greenwich, CT: less fiber coverage, slower speeds
- Scotts Corners, NY: more fiber coverage, slower speeds
- Wilton, CT: less fiber coverage, slower speeds
Cities with Similar Populations
- Rosedale, MD: less fiber coverage, slower speeds
- Milwaukie, OR: less fiber coverage, slower speeds
- Mineola, NY: less fiber coverage, slower speeds
- Northdale, FL: less fiber coverage, slower speeds
- Oregon, OH: less fiber coverage, slower speeds
- Orocovis, PR: less fiber coverage, slower speeds
- Owens Cross Roads, AL: less fiber coverage, faster speeds
- Oxon Hill, MD: less fiber coverage, slower speeds
- Palm River-Clair Mel, FL: less fiber coverage, slower speeds
- Palmyra, PA: less fiber coverage, slower speeds