In Thornton there are 2 residential Fiber providers covering 23.25% of the city. The average home can get speeds up to 3,895 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 Thornton, CO.
To see availability maps for all providers including fiber, cable, DSL, and more in Thornton, CO please click below.
Thornton, CO Availability Maps
Fiber Internet Service Providers in Thornton
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 Thornton are not shown.
Thornton 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 Thornton is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 23.25% of Thornton. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Quantum Fiber. Call one of the companies with service in Thornton above to see who has service at your home.
How fast is fiber internet in Thornton?
The map below shows maximum fiber internet speeds by area in Thornton.
Fiber Internet Speed Key
The average Thornton home can get up to 3,895 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 8,000 Mbps, which 7.73% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 1.44% of homes can only purchase plans up to 940 Mbps. See the internet provider details below for info about their speed and coverage in Thornton.
Fiber internet speeds tend to be faster in the east parts of Thornton, and slower in the north areas of the city.
Is fiber the fastest internet I can get in Thornton?
The fastest internet for you may vary based on where in Thornton you live. In general, cable competes most often with fiber in the city.
- Fiber is the fastest internet type for 20.82% of Thornton homes.
- Cable is fastest for 78.86% 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 Thornton homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Thornton, along with details on where in Thornton and at what speeds.
Quantum Fiber Fiber in Thornton, CO
Quantum Fiber fiber coverage
About 21.20%, or 18,826 people, have Quantum Fiber fiber internet available to them in the city. The company covers the east, south, southwest, west, southeast, northeast, central, and north Thornton 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 Thornton.
Quantum Fiber fiber download speeds
Quantum Fiber is the fastest when comparing download speeds to all other internet providers in Thornton. Versus other fiber providers in the area, Quantum Fiber fiber is the fastest. There are 4 different maximum speeds throughout Thornton. The fastest plan anyone in Thornton can order from Quantum Fiber goes up to 8,000 Mbps, the slowest package only goes up to 940 Mbps, and the city-wide average maximum speed for Thornton customers is up to 4,130 Mbps.
Show all download speeds
- 36.5% up to 8,000.0 Mbps
- 58.0% up to 2,000.0 Mbps
- 0.9% up to 1,000.0 Mbps
- 4.6% up to 940.0 Mbps
Quantum Fiber fiber upload speeds
In Thornton download speeds tend to be faster than than upload speeds for Quantum Fiber fiber. Compared to other ISPs, Quantum Fiber is the fastest where upload speeds are concerned, and the fastest compared to other Thornton fiber providers. Quantum Fiber offers 3 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 Thornton is up to 8,000 Mbps. Some customers have slower plan choices, which only go up to 940 Mbps. On average, Quantum Fiber customers can get speeds up to 3,550 Mbps.
Show all upload speeds
- 36.5% up to 8,000.0 Mbps
- 59.0% up to 1,000.0 Mbps
- 4.6% up to 940.0 Mbps
Centurylink Fiber in Thornton, CO
Centurylink fiber coverage
About 15.58%, or 13,835 people, have Centurylink fiber internet available to them in the city. The company covers the south, east, southwest, northeast, west, southeast, and central Thornton 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 Thornton.
Centurylink fiber download speeds
Centurylink is above average when comparing download speeds to all other internet providers in Thornton. Versus other fiber providers in the area, Centurylink fiber is above average. There are 6 different maximum speeds throughout Thornton. The fastest plan anyone in Thornton can order from Centurylink goes up to 8,000 Mbps, the slowest package only goes up to 80 Mbps, and the city-wide average maximum speed for Thornton customers is up to 2,595 Mbps.
Show all download speeds
- 23.6% up to 8,000.0 Mbps
- 6.5% up to 1,000.0 Mbps
- 67.9% up to 940.0 Mbps
- 0.6% up to 200.0 Mbps
- 1.0% up to 100.0 Mbps
- 0.4% up to 80.0 Mbps
Centurylink fiber upload speeds
In Thornton 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 above average compared to other Thornton fiber providers. Centurylink offers 8 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 Thornton is up to 8,000 Mbps. Some customers have slower plan choices, which only go up to 10 Mbps. On average, Centurylink customers can get speeds up to 2,466 Mbps.
Show all upload speeds
- 23.6% up to 8,000.0 Mbps
- 6.5% up to 1,000.0 Mbps
- 50.3% up to 940.0 Mbps
- 0.5% up to 500.0 Mbps
- 17.7% up to 200.0 Mbps
- 0.8% up to 100.0 Mbps
- 0.3% up to 50.0 Mbps
- 0.4% up to 10.0 Mbps
Thornton Fiber by Area
This information is most helpful to those looking for homes or considering moving to Thornton or any of the areas nearby.
How does fiber internet in Thornton compare to the rest of Colorado?
Fiber internet speeds in Thornton are much faster versus the average speeds in Colorado: 0.00 Mbps in Colorado versus 3,895 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in Colorado is 0.00% versus 23.25% in Thornton.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Thornton 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
- Northglenn, CO: more fiber coverage, faster speeds
- Welby, CO: more fiber coverage, faster speeds
- Federal Heights, CO: less fiber coverage, faster speeds
- Westminster, CO: more fiber coverage, slower speeds
- Sherrelwood, CO: more fiber coverage, slower speeds
- Derby, CO: more fiber coverage, slower speeds
- Henderson, CO: less fiber coverage, faster speeds
- Broomfield, CO: more fiber coverage, slower speeds
- North Washington, CO: more fiber coverage, faster speeds
- Commerce City, CO: more fiber coverage, slower speeds
Cities with Similar Populations
- Brandon, FL: more fiber coverage, faster speeds
- Broomfield, CO: more fiber coverage, slower speeds
- Bismarck, ND: more fiber coverage, slower speeds
- Billings, MT: more fiber coverage, faster speeds
- Bowling Green, KY: more fiber coverage, faster speeds
- Brick, NJ: more fiber coverage, slower speeds
- Boca Raton, FL: more fiber coverage, faster speeds
- Brockton, MA: more fiber coverage, slower speeds
- Bethesda, MD: more fiber coverage, slower speeds
- Brandon, MS: more fiber coverage, faster speeds