In Clinton County there are 3 residential DSL providers covering 71.92% 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 Clinton County, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in Clinton County, IL please click below.
Clinton County, IL Availability Maps
DSL Internet Service Providers in Clinton 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 Clinton County are not shown.
Clinton 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 Clinton County is DSL internet available?
DSL Internet Availability Key
DSL is available in 71.92% of Clinton 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 Clinton County above to see who has service at your home.
How fast is DSL internet in Clinton County?
The map below shows maximum DSL internet speeds by area in Clinton County.
DSL Internet Speed Key
The average Clinton 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 4.25% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 61.89% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Clinton County.
DSL internet speeds tend to be faster in the northeast parts of Clinton County, and slower in the west areas of the county.
Is DSL the fastest internet I can get in Clinton County?
The fastest internet for you may vary based on where in Clinton County you live. In general, fiber competes most often with DSL in the county.
- Fiber is the fastest internet type for 99.44% of Clinton County homes.
- Cable is fastest for less than 1% of the county.
- 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 Clinton County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Clinton County, along with details on where in Clinton County and at what speeds.
EarthLink DSL in Clinton County, IL
EarthLink DSL coverage
About 47.70%, or 17,600 people, have EarthLink DSL internet available to them in the county. The company covers the entire Clinton County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in some of Clinton County.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Clinton County. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are no different maximum speeds throughout Clinton County. The fastest plan anyone in Clinton County can order from EarthLink goes up to 10 Mbps, and all Clinton County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Clinton 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 Clinton County DSL providers. EarthLink offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Clinton County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
AT&T DSL in Clinton County, IL
AT&T DSL coverage
About 47.70%, or 17,600 people, have AT&T DSL internet available to them in the county. The company covers the entire Clinton County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in some of Clinton County.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Clinton County. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are no different maximum speeds throughout Clinton County. The fastest plan anyone in Clinton County can order from AT&T goes up to 10 Mbps, and all Clinton County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Clinton 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 Clinton County DSL providers. AT&T offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Clinton 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 Clinton County, IL
Frontier DSL coverage
About 24.29%, or 8,962 people, have Frontier DSL internet available to them in the county. The company covers the entire Clinton 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 Clinton County.
Frontier Communications DSL download speeds
Frontier is below average when comparing download speeds to all other internet providers in Clinton County. Versus other DSL providers in the area, Frontier DSL is the fastest. There are 5 different maximum speeds throughout Clinton County. The fastest plan anyone in Clinton 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 Clinton County customers is up to 43 Mbps.
Show all download speeds
- 17.5% up to 115.0 Mbps
- 11.2% up to 90.0 Mbps
- 6.1% up to 70.0 Mbps
- 6.5% up to 45.0 Mbps
- 58.7% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Clinton 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 Clinton 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 Clinton 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 2.7 Mbps.
Show all upload speeds
- 17.5% up to 7.0 Mbps
- 11.2% up to 5.0 Mbps
- 12.6% up to 3.0 Mbps
- 58.7% up to 1.0 Mbps
Clinton County DSL by Area
This information is most helpful to those looking for homes or considering moving to Clinton County or any of the areas nearby.
How does DSL internet in Clinton County compare to the rest of Illinois?
DSL internet speeds in Clinton 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 71.92% in Clinton County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Clinton 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
- Marion County, IL: less DSL coverage, slower speeds
- St. Clair County, IL: more DSL coverage, faster speeds
- St. Louis City, MO: more DSL coverage, faster speeds
- St. Louis County, MO: more DSL coverage, faster speeds
- Wayne County, IL: less DSL coverage, faster speeds
- Edwards County, IL: less DSL coverage, faster speeds
- Franklin County, MO: less DSL coverage, faster speeds
- Wabash County, IL: more DSL coverage, faster speeds
- Gasconade County, MO: less DSL coverage, faster speeds
- Knox County, IN: less DSL coverage, faster speeds
Counties with Similar Populations
- Las Piedras Municipio, PR: more DSL coverage, slower speeds
- Montrose County, CO: more DSL coverage, faster speeds
- Monroe County, WI: more DSL coverage, faster speeds
- Monroe County, TN: less DSL coverage, faster speeds
- Macoupin County, IL: less DSL coverage, faster speeds
- Macon County, NC: less DSL coverage, faster speeds
- Lyon County, KS: less DSL coverage, slower speeds
- Louisa County, VA: less DSL coverage, faster speeds
- Logan County, OH: more DSL coverage, faster speeds
- Livingston County, IL: less DSL coverage, faster speeds