In Williamson County there are 5 residential Fiber providers covering 93.99% of the county. The average home can get speeds up to 6,385 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 Williamson County, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in Williamson County, IL please click below.
Williamson County, IL Availability Maps
Fiber Internet Service Providers in Williamson 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 Williamson County are not shown.
Williamson 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 Williamson County is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 93.99% of Williamson County. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Cable One. Call one of the companies with service in Williamson County above to see who has service at your home.
How fast is fiber internet in Williamson County?
The map below shows maximum fiber internet speeds by area in Williamson County.
Fiber Internet Speed Key
The average Williamson County home can get up to 6,385 Mbps on their fiber internet plan. The fastest fiber download speed in the county is 10,000 Mbps, which 20.87% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 12.97% of homes can only purchase plans up to 1,000 Mbps. See the internet provider details below for info about their speed and coverage in Williamson County.
Fiber internet speeds tend to be faster in the southwest parts of Williamson County, and slower in the northeast areas of the county.
Is fiber the fastest internet I can get in Williamson County?
The fastest internet for you may vary based on where in Williamson County you live. In general, cable competes most often with fiber in the county.
- Fiber is the fastest internet type for 93.99% of Williamson County homes.
- Cable is fastest for 4.36% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 1.19%.
- Satellite internet may be the only option for less than 1% of Williamson County homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Williamson County, along with details on where in Williamson County and at what speeds.
Frontier Communications Fiber in Williamson County, IL
Frontier fiber coverage
About 48.70%, or 32,702 people, have Frontier fiber internet available to them in the county. The company covers the south, west, northwest, north, southeast, east, central, and southwest Williamson County area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in some of Williamson County.
Frontier Communications fiber download speeds
Frontier is above average when comparing download speeds to all other internet providers in Williamson County. Versus other fiber providers in the area, Frontier fiber is above average. There are 3 different maximum speeds throughout Williamson County. The fastest plan anyone in Williamson County can order from Frontier goes up to 7,000 Mbps, the slowest package only goes up to 4,000 Mbps, and the county-wide average maximum speed for Williamson County customers is up to 5,271 Mbps.
Show all download speeds
- 13.6% up to 7,000.0 Mbps
- 86.4% up to 5,000.0 Mbps
- 0.0% up to 4,000.0 Mbps
Frontier Communications fiber upload speeds
In Williamson County 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 Williamson County fiber providers. Frontier 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 Williamson County is up to 7,000 Mbps. Some customers have slower plan choices, which only go up to 4,000 Mbps. On average, Frontier customers can get speeds up to 5,271 Mbps.
Show all upload speeds
- 13.6% up to 7,000.0 Mbps
- 86.4% up to 5,000.0 Mbps
- 0.0% up to 4,000.0 Mbps
Hamilton County Communications Fiber in Williamson County, IL
Hamilton County Communications fiber coverage
About 45.05%, or 30,250 people, have Hamilton County Communications fiber internet available to them in the county. The company covers the west, east, south, southeast, northeast, central, north, and northwest Williamson County area. Hamilton County Communications is a large internet service provider internet service providers in the US, with internet service available in some of Williamson County.
Hamilton County Communications fiber download speeds
Hamilton County Communications is below average when comparing download speeds to all other internet providers in Williamson County. Versus other fiber providers in the area, Hamilton County Communications fiber is one of the slowest. There are no different maximum speeds throughout Williamson County. The fastest plan anyone in Williamson County can order from Hamilton County Communications goes up to 1,000 Mbps, and all Williamson County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Hamilton County Communications fiber upload speeds
In Williamson County download speeds tend to be equal to than upload speeds for Hamilton County Communications fiber. Compared to other ISPs, Hamilton County Communications is below average where upload speeds are concerned, and below average compared to other Williamson County fiber providers. Hamilton County Communications offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Williamson County is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Sparklight Fiber in Williamson County, IL
Sparklight fiber coverage
About 42.49%, or 28,531 people, have Sparklight fiber internet available to them in the county. The company covers the entire Williamson County area. Sparklight is one of the largest internet service providers internet service providers in the US, with internet service available in some of Williamson County.
Sparklight fiber download speeds
Sparklight is above average when comparing download speeds to all other internet providers in Williamson County. Versus other fiber providers in the area, Sparklight fiber is above average. There are no different maximum speeds throughout Williamson County. The fastest plan anyone in Williamson County can order from Sparklight goes up to 7,000 Mbps, and all Williamson County customers can get this speed.
Show all download speeds
- 100.0% up to 7,000.0 Mbps
Sparklight fiber upload speeds
In Williamson County download speeds tend to be equal to than upload speeds for Sparklight fiber. Compared to other ISPs, Sparklight is above average where upload speeds are concerned, and above average compared to other Williamson County fiber providers. Sparklight offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Williamson County is up to 7,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 7,000.0 Mbps
ProTek Communications Fiber in Williamson County, IL
ProTek Communications fiber coverage
About 20.87%, or 14,013 people, have ProTek Communications fiber internet available to them in the county. The company covers the south, southeast, north, southwest, central, east, and northeast Williamson County area. ProTek Communications is an average-sized internet service provider internet service providers in the US, with internet service available in a small portion of Williamson County.
ProTek Communications fiber download speeds
ProTek Communications is the fastest when comparing download speeds to all other internet providers in Williamson County. Versus other fiber providers in the area, ProTek Communications fiber is the fastest. There are no different maximum speeds throughout Williamson County. The fastest plan anyone in Williamson County can order from ProTek Communications goes up to 10,000 Mbps, and all Williamson County customers can get this speed.
Show all download speeds
- 100.0% up to 10,000.0 Mbps
ProTek Communications fiber upload speeds
In Williamson County download speeds tend to be equal to than upload speeds for ProTek Communications fiber. Compared to other ISPs, ProTek Communications is the fastest where upload speeds are concerned, and the fastest compared to other Williamson County fiber providers. ProTek Communications offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Williamson 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
Southern Illinois Wireless Internet Fiber in Williamson County, IL
4SIWI fiber coverage
About 7.32%, or 4,917 people, have 4SIWI fiber internet available to them in the county. The company covers the south, southeast, west, central, and east Williamson County area. 4SIWI is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Williamson County.
Southern Illinois Wireless Internet fiber download speeds
4SIWI is below average when comparing download speeds to all other internet providers in Williamson County. Versus other fiber providers in the area, 4SIWI fiber is one of the slowest. There are no different maximum speeds throughout Williamson County. The fastest plan anyone in Williamson County can order from 4SIWI goes up to 1,000 Mbps, and all Williamson County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Southern Illinois Wireless Internet fiber upload speeds
In Williamson County download speeds tend to be equal to than upload speeds for 4SIWI fiber. Compared to other ISPs, 4SIWI is below average where upload speeds are concerned, and below average compared to other Williamson County fiber providers. 4SIWI offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Williamson County is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Williamson County Fiber by Area
This information is most helpful to those looking for homes or considering moving to Williamson County or any of the areas nearby.
How does fiber internet in Williamson County compare to the rest of Illinois?
Fiber internet speeds in Williamson County are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 6,385 Mbps in the county. The state has similar fiber availability compared to the county. Average fiber coverage in Illinois is 0.00% versus 93.99% in Williamson County.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Williamson 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
- Jackson County, IL: less fiber coverage, faster speeds
- Saline County, IL: more fiber coverage, faster speeds
- Gallatin County, IL: more fiber coverage, faster speeds
- Perry County, MO: less fiber coverage, slower speeds
- Union County, KY: less fiber coverage, slower speeds
- Henderson County, KY: less fiber coverage, slower speeds
- St. Francois County, MO: more fiber coverage, faster speeds
- Daviess County, KY: more fiber coverage, slower speeds
- Hancock County, KY: more fiber coverage, slower speeds
- Breckinridge County, KY: less fiber coverage, slower speeds
Counties with Similar Populations
- Valencia County, NM: less fiber coverage, slower speeds
- White County, AR: less fiber coverage, slower speeds
- Pulaski County, KY: less fiber coverage, slower speeds
- Otero County, NM: less fiber coverage, slower speeds
- Otsego County, NY: less fiber coverage, slower speeds
- Oxford County, ME: less fiber coverage, slower speeds
- Pender County, NC: less fiber coverage, slower speeds
- Pickaway County, OH: less fiber coverage, slower speeds
- Pike County, KY: less fiber coverage, slower speeds
- Pike County, PA: less fiber coverage, slower speeds