In Cook County there are 2 residential DSL providers covering 90.34% of the county. The average home can get speeds up to 74 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 Cook County, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in Cook County, IL please click below.
Cook County, IL Availability Maps
DSL Internet Service Providers in Cook 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 Cook County are not shown.
Cook 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 Cook County is DSL internet available?
DSL Internet Availability Key
DSL is available in 90.34% of Cook County. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is AT&T. Call one of the companies with service in Cook County above to see who has service at your home.
How fast is DSL internet in Cook County?
The map below shows maximum DSL internet speeds by area in Cook County.
DSL Internet Speed Key
The average Cook County home can get up to 74 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 100 Mbps, which 50.69% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 14.07% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Cook County.
DSL internet speeds tend to be faster in the central parts of Cook County, and slower in the east areas of the county.
Is DSL the fastest internet I can get in Cook County?
The fastest internet for you may vary based on where in Cook County you live. In general, cable competes most often with DSL in the county.
- Fiber is the fastest internet type for 24.80% of Cook County homes.
- Cable is fastest for 74.26% 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 Cook County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Cook County, along with details on where in Cook County and at what speeds.
AT&T DSL in Cook County, IL
AT&T DSL coverage
About 90.34%, or 4,766,051 people, have AT&T DSL internet available to them in the county. The company covers the entire Cook County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Cook County.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Cook County. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 5 different maximum speeds throughout Cook County. The fastest plan anyone in Cook County can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Cook County customers is up to 74 Mbps.
Show all download speeds
- 56.1% up to 100.0 Mbps
- 11.2% up to 75.0 Mbps
- 14.2% up to 50.0 Mbps
- 2.9% up to 25.0 Mbps
- 15.6% up to 10.0 Mbps
AT&T DSL upload speeds
In Cook County download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and one of the fastest compared to other Cook County DSL providers. AT&T 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 Cook County is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, AT&T customers can get speeds up to 15 Mbps.
Show all upload speeds
- 67.3% up to 20.0 Mbps
- 14.2% up to 10.0 Mbps
- 2.9% up to 5.0 Mbps
- 15.6% up to 1.0 Mbps
EarthLink DSL in Cook County, IL
EarthLink DSL coverage
About 90.34%, or 4,766,051 people, have EarthLink DSL internet available to them in the county. The company covers the entire Cook County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Cook County.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Cook County. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 5 different maximum speeds throughout Cook County. The fastest plan anyone in Cook County can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Cook County customers is up to 74 Mbps.
Show all download speeds
- 56.1% up to 100.0 Mbps
- 11.2% up to 75.0 Mbps
- 14.2% up to 50.0 Mbps
- 2.9% up to 25.0 Mbps
- 15.6% up to 10.0 Mbps
EarthLink DSL upload speeds
In Cook County download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is below average where upload speeds are concerned, and one of the fastest compared to other Cook County DSL providers. EarthLink 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 Cook County is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, EarthLink customers can get speeds up to 15 Mbps.
Show all upload speeds
- 67.3% up to 20.0 Mbps
- 14.2% up to 10.0 Mbps
- 2.9% up to 5.0 Mbps
- 15.6% up to 1.0 Mbps
Cook County DSL by Area
This information is most helpful to those looking for homes or considering moving to Cook County or any of the areas nearby.
How does DSL internet in Cook County compare to the rest of Illinois?
DSL internet speeds in Cook County are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 74 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in Illinois is 0.00% versus 90.34% in Cook County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Cook 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
- DuPage County, IL: more DSL coverage, slower speeds
- Kane County, IL: less DSL coverage, slower speeds
- DeKalb County, IL: less DSL coverage, slower speeds
- Berrien County, MI: less DSL coverage, slower speeds
- Lee County, IL: less DSL coverage, slower speeds
- Cass County, MI: less DSL coverage, slower speeds
- Whiteside County, IL: less DSL coverage, slower speeds
- St. Joseph County, MI: less DSL coverage, slower speeds
- Clinton County, IA: less DSL coverage, slower speeds
- Branch County, MI: less DSL coverage, slower speeds
Counties with Similar Populations
- Orange County, CA: less DSL coverage, faster speeds
- Maricopa County, AZ: less DSL coverage, faster speeds
- Los Angeles County, CA: less DSL coverage, slower speeds
- San Diego County, CA: less DSL coverage, faster speeds
- Harris County, TX: less DSL coverage, slower speeds
- Miami-Dade County, FL: less DSL coverage, slower speeds
- Kings County, NY: less DSL coverage, slower speeds
- Dallas County, TX: less DSL coverage, slower speeds
- Denton County, TX: less DSL coverage, slower speeds
- Butler County, OH: less DSL coverage, slower speeds