In Jefferson County there are 4 residential DSL providers covering 35.17% of the county. The average home can get speeds up to 29 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 Jefferson County, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in Jefferson County, IL please click below.
Jefferson County, IL Availability Maps
DSL Internet Service Providers in Jefferson 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 Jefferson County are not shown.
Jefferson 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 Jefferson County is DSL internet available?
DSL Internet Availability Key
DSL is available in 35.17% of Jefferson 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 Jefferson County above to see who has service at your home.
How fast is DSL internet in Jefferson County?
The map below shows maximum DSL internet speeds by area in Jefferson County.
DSL Internet Speed Key
The average Jefferson County home can get up to 29 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 115 Mbps, which 3.90% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 27.71% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Jefferson County.
DSL internet speeds tend to be faster in the southwest parts of Jefferson County, and slower in the central areas of the county.
Is DSL the fastest internet I can get in Jefferson County?
The fastest internet for you may vary based on where in Jefferson County you live. In general, fiber competes most often with DSL in the county.
- Fiber is the fastest internet type for 93.36% of Jefferson County homes.
- Cable is fastest for 1.83% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 3.68%.
- Satellite internet may be the only option for less than 1% of Jefferson County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Jefferson County, along with details on where in Jefferson County and at what speeds.
AT&T DSL in Jefferson County, IL
AT&T DSL coverage
About 18.50%, or 6,865 people, have AT&T DSL internet available to them in the county. The company covers the central, east, north, south, west, southeast, and northeast Jefferson County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Jefferson County.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Jefferson County. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are no different maximum speeds throughout Jefferson County. The fastest plan anyone in Jefferson County can order from AT&T goes up to 10 Mbps, and all Jefferson County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Jefferson County download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Jefferson County DSL providers. AT&T offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Jefferson County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
EarthLink DSL in Jefferson County, IL
EarthLink DSL coverage
About 18.50%, or 6,865 people, have EarthLink DSL internet available to them in the county. The company covers the central, east, north, south, west, southeast, and northeast Jefferson County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Jefferson County.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Jefferson County. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are no different maximum speeds throughout Jefferson County. The fastest plan anyone in Jefferson County can order from EarthLink goes up to 10 Mbps, and all Jefferson County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Jefferson County download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Jefferson County DSL providers. EarthLink offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Jefferson County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Frontier Communications DSL in Jefferson County, IL
Frontier DSL coverage
About 13.56%, or 5,031 people, have Frontier DSL internet available to them in the county. The company covers the northwest, southwest, west, south, southeast, and east Jefferson County area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Jefferson County.
Frontier Communications DSL download speeds
Frontier is below average when comparing download speeds to all other internet providers in Jefferson County. Versus other DSL providers in the area, Frontier DSL is the fastest. There are 5 different maximum speeds throughout Jefferson County. The fastest plan anyone in Jefferson 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 Jefferson County customers is up to 58 Mbps.
Show all download speeds
- 28.8% up to 115.0 Mbps
- 16.1% up to 90.0 Mbps
- 5.3% up to 70.0 Mbps
- 4.9% up to 45.0 Mbps
- 44.9% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Jefferson County download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is below average where upload speeds are concerned, and the fastest compared to other Jefferson 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 Jefferson 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 3.6 Mbps.
Show all upload speeds
- 28.8% up to 7.0 Mbps
- 16.1% up to 5.0 Mbps
- 10.2% up to 3.0 Mbps
- 44.9% up to 1.0 Mbps
Hamilton County Communications DSL in Jefferson County, IL
Hamilton County Communications DSL coverage
About 3.12%, or 1,158 people, have Hamilton County Communications DSL internet available to them in the county. The company covers the southeast Jefferson County area. Hamilton County Communications is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Jefferson County.
Hamilton County Communications DSL download speeds
Hamilton County Communications is one of the slowest when comparing download speeds to all other internet providers in Jefferson County. Versus other DSL providers in the area, Hamilton County Communications DSL is one of the slowest. There are no different maximum speeds throughout Jefferson County. The fastest plan anyone in Jefferson County can order from Hamilton County Communications goes up to 10 Mbps, and all Jefferson County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
Hamilton County Communications DSL upload speeds
In Jefferson County download speeds tend to be faster than than upload speeds for Hamilton County Communications DSL. Compared to other ISPs, Hamilton County Communications is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Jefferson County DSL providers. Hamilton County Communications offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Jefferson County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Jefferson County DSL by Area
This information is most helpful to those looking for homes or considering moving to Jefferson County or any of the areas nearby.
How does DSL internet in Jefferson County compare to the rest of Illinois?
DSL internet speeds in Jefferson County are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 29 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in Illinois is 0.00% versus 35.17% in Jefferson County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Jefferson 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
- Washington County, IL: more DSL coverage, faster speeds
- Wayne County, IL: more DSL coverage, faster speeds
- Edwards County, IL: more DSL coverage, faster speeds
- Wabash County, IL: more DSL coverage, slower speeds
- Monroe County, IL: more DSL coverage, faster speeds
- Gibson County, IN: more DSL coverage, faster speeds
- Jefferson County, MO: more DSL coverage, faster speeds
- Pike County, IN: more DSL coverage, faster speeds
- Dubois County, IN: more DSL coverage, slower speeds
- Franklin County, MO: more DSL coverage, faster speeds
Counties with Similar Populations
- Suwannee County, FL: more DSL coverage, faster speeds
- Del Norte County, CA: more DSL coverage, slower speeds
- Delaware County, OK: more DSL coverage, slower speeds
- Delta County, CO: more DSL coverage, faster speeds
- Delta County, MI: more DSL coverage, slower speeds
- Des Moines County, IA: more DSL coverage, faster speeds
- Douglas County, WI: more DSL coverage, faster speeds
- Dubois County, IN: more DSL coverage, slower speeds
- Dunn County, WI: more DSL coverage, slower speeds
- Stephenson County, IL: more DSL coverage, slower speeds