In Boulder County there are 6 residential Fiber providers covering 58.29% of the county. The average home can get speeds up to 5,977 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 Boulder County, CO.
To see availability maps for all providers including fiber, cable, DSL, and more in Boulder County, CO please click below.
Boulder County, CO Availability Maps
Fiber Internet Service Providers in Boulder County
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 Boulder County are not shown.
Boulder County 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 Boulder County is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 58.29% of Boulder County. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is NextLight. Call one of the companies with service in Boulder County above to see who has service at your home.
How fast is fiber internet in Boulder County?
The map below shows maximum fiber internet speeds by area in Boulder County.
Fiber Internet Speed Key
The average Boulder County home can get up to 5,977 Mbps on their fiber internet plan. The fastest fiber download speed in the county is 10,000 Mbps, which 29.76% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 25 Mbps. See the internet provider details below for info about their speed and coverage in Boulder County.
Fiber internet speeds tend to be faster in the northeast parts of Boulder County, and slower in the northwest areas of the county.
Is fiber the fastest internet I can get in Boulder County?
The fastest internet for you may vary based on where in Boulder County you live. In general, cable competes most often with fiber in the county.
- Fiber is the fastest internet type for 49.67% of Boulder County homes.
- Cable is fastest for 44.75% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 2.93%.
- Satellite internet may be the only option for 2.36% of Boulder County homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Boulder County, along with details on where in Boulder County and at what speeds.
NextLight Fiber in Boulder County, CO
NextLight fiber coverage
About 29.73%, or 98,335 people, have NextLight fiber internet available to them in the county. The company covers the northeast and north Boulder County area. NextLight is a large internet service provider internet service providers in the US, with internet service available in a small portion of Boulder County.
NextLight fiber download speeds
NextLight is the fastest when comparing download speeds to all other internet providers in Boulder County. Versus other fiber providers in the area, NextLight fiber is the fastest. There are no different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from NextLight goes up to 10,000 Mbps, and all Boulder County customers can get this speed.
Show all download speeds
- 100.0% up to 10,000.0 Mbps
NextLight fiber upload speeds
In Boulder County download speeds tend to be equal to than upload speeds for NextLight fiber. Compared to other ISPs, NextLight is the fastest where upload speeds are concerned, and the fastest compared to other Boulder County fiber providers. NextLight offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Boulder County is up to 10,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 10,000.0 Mbps
Quantum Fiber Fiber in Boulder County, CO
Quantum Fiber fiber coverage
About 24.28%, or 80,297 people, have Quantum Fiber fiber internet available to them in the county. The company covers the west, southwest, southeast, south, northeast, east, north, and central Boulder County area. Quantum Fiber is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Boulder County.
Quantum Fiber fiber download speeds
Quantum Fiber is above average when comparing download speeds to all other internet providers in Boulder County. Versus other fiber providers in the area, Quantum Fiber fiber is below average. There are 5 different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from Quantum Fiber goes up to 8,000 Mbps, the slowest package only goes up to 500 Mbps, and the county-wide average maximum speed for Boulder County customers is up to 1,690 Mbps.
Show all download speeds
- 1.2% up to 8,000.0 Mbps
- 62.6% up to 2,000.0 Mbps
- 13.3% up to 1,000.0 Mbps
- 22.2% up to 940.0 Mbps
- 0.7% up to 500.0 Mbps
Quantum Fiber fiber upload speeds
In Boulder County download speeds tend to be faster than than upload speeds for Quantum Fiber fiber. Compared to other ISPs, Quantum Fiber is above average where upload speeds are concerned, and below average compared to other Boulder County fiber providers. Quantum Fiber offers 4 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Boulder County is up to 8,000 Mbps. Some customers have slower plan choices, which only go up to 500 Mbps. On average, Quantum Fiber customers can get speeds up to 1,064 Mbps.
Show all upload speeds
- 1.2% up to 8,000.0 Mbps
- 75.9% up to 1,000.0 Mbps
- 22.2% up to 940.0 Mbps
- 0.7% up to 500.0 Mbps
Centurylink Fiber in Boulder County, CO
Centurylink fiber coverage
About 21.93%, or 72,530 people, have Centurylink fiber internet available to them in the county. The company covers the west, southwest, southeast, south, east, northeast, north, and central Boulder County area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Boulder County.
Centurylink fiber download speeds
Centurylink is below average when comparing download speeds to all other internet providers in Boulder County. Versus other fiber providers in the area, Centurylink fiber is below average. There are 7 different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from Centurylink goes up to 1,000 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Boulder County customers is up to 945 Mbps.
Show all download speeds
- 63.6% up to 1,000.0 Mbps
- 32.5% up to 940.0 Mbps
- 0.6% up to 200.0 Mbps
- 1.9% up to 100.0 Mbps
- 0.1% up to 80.0 Mbps
- 0.1% up to 40.0 Mbps
- 1.2% up to 10.0 Mbps
Centurylink fiber upload speeds
In Boulder County download speeds tend to be faster than than upload speeds for Centurylink fiber. Compared to other ISPs, Centurylink is above average where upload speeds are concerned, and below average compared to other Boulder County fiber providers. Centurylink offers 9 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Boulder County is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Centurylink customers can get speeds up to 904 Mbps.
Show all upload speeds
- 63.6% up to 1,000.0 Mbps
- 26.9% up to 940.0 Mbps
- 6.2% up to 200.0 Mbps
- 1.9% up to 100.0 Mbps
- 0.1% up to 40.0 Mbps
- 0.0% up to 20.0 Mbps
- 0.1% up to 10.0 Mbps
- 0.0% up to 3.0 Mbps
- 1.2% up to 1.0 Mbps
Allo Fiber in Boulder County, CO
Allo fiber coverage
About 3.55%, or 11,731 people, have Allo fiber internet available to them in the county. The company covers the east Boulder County area. Allo is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Boulder County.
Allo fiber download speeds
Allo is above average when comparing download speeds to all other internet providers in Boulder County. Versus other fiber providers in the area, Allo fiber is above average. There are no different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from Allo goes up to 2,300 Mbps, and all Boulder County customers can get this speed.
Show all download speeds
- 100.0% up to 2,300.0 Mbps
Allo fiber upload speeds
In Boulder County download speeds tend to be equal to than upload speeds for Allo fiber. Compared to other ISPs, Allo is above average where upload speeds are concerned, and above average compared to other Boulder County fiber providers. Allo offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Boulder County is up to 2,300 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,300.0 Mbps
Intrepid Fiber Networks Fiber in Boulder County, CO
Intrepid Fiber fiber coverage
About 2.32%, or 7,665 people, have Intrepid Fiber fiber internet available to them in the county. The company covers the southeast and south Boulder County area. Intrepid Fiber is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Boulder County.
Intrepid Fiber Networks fiber download speeds
Intrepid Fiber is above average when comparing download speeds to all other internet providers in Boulder County. Versus other fiber providers in the area, Intrepid Fiber fiber is below average. There are no different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from Intrepid Fiber goes up to 2,000 Mbps, and all Boulder County customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
Intrepid Fiber Networks fiber upload speeds
In Boulder County download speeds tend to be equal to than upload speeds for Intrepid Fiber fiber. Compared to other ISPs, Intrepid Fiber is above average where upload speeds are concerned, and below average compared to other Boulder County fiber providers. Intrepid Fiber offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Boulder County is up to 2,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,000.0 Mbps
XFINITY from Comcast Fiber in Boulder County, CO
XFINITY fiber coverage
About 1.87%, or 6,183 people, have XFINITY fiber internet available to them in the county. The company covers the northeast, east, southeast, north, south, central, and west Boulder County 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 Boulder County.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in Boulder County. Versus other fiber providers in the area, XFINITY fiber is below average. There are 3 different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the county-wide average maximum speed for Boulder County customers is up to 1,306 Mbps.
Show all download speeds
- 13.5% up to 2,000.0 Mbps
- 86.0% up to 1,200.0 Mbps
- 0.6% up to 1,000.0 Mbps
XFINITY from Comcast fiber upload speeds
In Boulder County 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 below average compared to other Boulder County fiber providers. XFINITY offers 3 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Boulder County is up to 2,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 327 Mbps.
Show all upload speeds
- 13.5% up to 2,000.0 Mbps
- 2.9% up to 1,000.0 Mbps
- 83.7% up to 35.0 Mbps
Boulder County Fiber by Area
This information is most helpful to those looking for homes or considering moving to Boulder County or any of the areas nearby.
How does fiber internet in Boulder County compare to the rest of Colorado?
Fiber internet speeds in Boulder County are much faster versus the average speeds in Colorado: 0.00 Mbps in Colorado versus 5,977 Mbps in the county. The state has similar fiber availability compared to the county. Average fiber coverage in Colorado is 0.00% versus 58.29% in Boulder County.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Boulder County 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 counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Broomfield County, CO: less fiber coverage, slower speeds
- Grand County, CO: less fiber coverage, slower speeds
- Washington County, CO: less fiber coverage, slower speeds
- Yuma County, CO: more fiber coverage, slower speeds
- Dundy County, NE: more fiber coverage, slower speeds
- Harlan County, NE: more fiber coverage, slower speeds
- Franklin County, NE: more fiber coverage, slower speeds
- Webster County, NE: more fiber coverage, slower speeds
- Nuckolls County, NE: more fiber coverage, slower speeds
- Thayer County, NE: more fiber coverage, slower speeds
Counties with Similar Populations
- Anoka County, MN: less fiber coverage, slower speeds
- Clackamas County, OR: more fiber coverage, slower speeds
- Bell County, TX: more fiber coverage, slower speeds
- Placer County, CA: less fiber coverage, slower speeds
- Pinal County, AZ: less fiber coverage, slower speeds
- Charleston County, SC: more fiber coverage, slower speeds
- Cameron County, TX: less fiber coverage, faster speeds
- Gloucester County, NJ: less fiber coverage, slower speeds
- Cumberland County, PA: more fiber coverage, slower speeds
- Rockingham County, NH: more fiber coverage, slower speeds