In Williamson County there is 1 residential DSL provider covering 28.35% of the county. The average home can get speeds up to 21 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 DSL 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
DSL Internet Service Provider 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 DSL internet available?
DSL Internet Availability Key
DSL is available in 28.35% of Williamson County. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Frontier. Call one of the companies with service in Williamson County above to see who has service at your home.
How fast is DSL internet in Williamson County?
The map below shows maximum DSL internet speeds by area in Williamson County.
DSL Internet Speed Key
The average Williamson County home can get up to 21 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 115 Mbps, which less than 1% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 23.63% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Williamson County.
DSL internet speeds tend to be faster in the northwest parts of Williamson County, and slower in the west areas of the county.
Is DSL 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, fiber competes most often with DSL 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.
DSL 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 DSL in Williamson County, IL
Frontier DSL coverage
About 28.35%, or 19,037 people, have Frontier DSL internet available to them in the county. The company covers the entire Williamson County area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Williamson County.
Frontier Communications DSL download speeds
Frontier is the slowest when comparing download speeds to all other internet providers in Williamson County. Versus other DSL providers in the area, Frontier DSL is the fastest. There are 5 different maximum speeds throughout Williamson County. The fastest plan anyone in Williamson County can order from Frontier goes up to 115 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Williamson County customers is up to 21 Mbps.
Show all download speeds
- 3.0% up to 115.0 Mbps
- 4.3% up to 90.0 Mbps
- 4.2% up to 70.0 Mbps
- 5.2% up to 45.0 Mbps
- 83.3% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Williamson County download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is the slowest where upload speeds are concerned, and the fastest compared to other Williamson County DSL providers. Frontier 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 Williamson County is up to 7.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Frontier customers can get speeds up to 1.5 Mbps.
Show all upload speeds
- 3.0% up to 7.0 Mbps
- 4.3% up to 5.0 Mbps
- 9.4% up to 3.0 Mbps
- 83.3% up to 1.0 Mbps
Williamson County DSL 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 DSL internet in Williamson County compare to the rest of Illinois?
DSL internet speeds in Williamson County are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 21 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in Illinois is 0.00% versus 28.35% in Williamson County.
What zip codes have DSL internet?
DSL 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 DSL 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: more DSL coverage, faster speeds
- Saline County, IL: more DSL coverage, faster speeds
- Gallatin County, IL: more DSL coverage, faster speeds
- Perry County, MO: more DSL coverage, slower speeds
- Union County, KY: more DSL coverage, faster speeds
- Henderson County, KY: more DSL coverage, slower speeds
- St. Francois County, MO: more DSL coverage, faster speeds
- Daviess County, KY: more DSL coverage, slower speeds
- Hancock County, KY: more DSL coverage, faster speeds
- Breckinridge County, KY: more DSL coverage, faster speeds
Counties with Similar Populations
- Valencia County, NM: more DSL coverage, faster speeds
- White County, AR: more DSL coverage, faster speeds
- Pulaski County, KY: more DSL coverage, faster speeds
- Otero County, NM: more DSL coverage, faster speeds
- Otsego County, NY: less DSL coverage, faster speeds
- Oxford County, ME: more DSL coverage, faster speeds
- Pender County, NC: more DSL coverage, faster speeds
- Pickaway County, OH: more DSL coverage, faster speeds
- Pike County, KY: more DSL coverage, slower speeds
- Pike County, PA: less DSL coverage, slower speeds