In St. Clair County there are 3 residential Cable providers covering 92.09% of the county. The average home can get speeds up to 1,000 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 Cable internet providers in St. Clair County, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in St. Clair County, IL please click below.
St. Clair County, IL Availability Maps
Cable Internet Service Providers in St. Clair 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 St. Clair County are not shown.
St. Clair 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 St. Clair County is cable internet available?
Cable Internet Availability Key
Cable is available in 92.09% of St. Clair County. Areas in green have cable internet service, where areas in yellow or red may not. The most widely available provider is Spectrum. Call one of the companies with service in St. Clair County above to see who has service at your home.
How fast is cable internet in St. Clair County?
The map below shows maximum cable internet speeds by area in St. Clair County.
Cable Internet Speed Key
The average St. Clair County home can get up to 1,000 Mbps on their cable internet plan. The fastest cable download speed in the county is 1,000 Mbps, which 92.09% of residents can get.
Is cable the fastest internet I can get in St. Clair County?
The fastest internet for you may vary based on where in St. Clair County you live. In general, fiber competes most often with cable in the county.
- Fiber is the fastest internet type for 38.70% of St. Clair County homes.
- Cable is fastest for 54.88% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 4.11%.
- Satellite internet may be the only option for 1.59% of St. Clair County homes.
Cable Providers in Depth
Below you'll find which TV and internet providers offer service in St. Clair County, along with details on where in St. Clair County and at what speeds.
Spectrum Cable in St. Clair County, IL
Spectrum cable coverage
About 88.64%, or 228,149 people, have Spectrum cable internet available to them in the county. The company covers the entire St. Clair County area. Spectrum is one of the largest internet service providers internet service providers in the US, with internet service available in most of St. Clair County.
Spectrum cable download speeds
Spectrum is below average when comparing download speeds to all other internet providers in St. Clair County. Versus other cable providers in the area, Spectrum cable is one of the fastest. There are no different maximum speeds throughout St. Clair County. The fastest plan anyone in St. Clair County can order from Spectrum goes up to 1,000 Mbps, and all St. Clair County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Spectrum cable upload speeds
In St. Clair County download speeds tend to be faster than than upload speeds for Spectrum cable. Compared to other ISPs, Spectrum is below average where upload speeds are concerned, and the fastest compared to other St. Clair County cable providers. Spectrum offers 2 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 St. Clair County is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, Spectrum customers can get speeds up to 999 Mbps.
Show all upload speeds
- 99.9% up to 1,000.0 Mbps
- 0.1% up to 35.0 Mbps
Sparklight Cable in St. Clair County, IL
Sparklight cable coverage
About 1.91%, or 4,921 people, have Sparklight cable internet available to them in the county. The company covers the southeast and northeast St. Clair County area. Sparklight is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of St. Clair County.
Sparklight cable download speeds
Sparklight is below average when comparing download speeds to all other internet providers in St. Clair County. Versus other cable providers in the area, Sparklight cable is one of the fastest. There are no different maximum speeds throughout St. Clair County. The fastest plan anyone in St. Clair County can order from Sparklight goes up to 1,000 Mbps, and all St. Clair County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Sparklight cable upload speeds
In St. Clair County download speeds tend to be faster than than upload speeds for Sparklight cable. Compared to other ISPs, Sparklight is below average where upload speeds are concerned, and one of the slowest compared to other St. Clair County cable providers. Sparklight offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in St. Clair County is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
Mediacom Cable in St. Clair County, IL
Mediacom cable coverage
About 1.73%, or 4,454 people, have Mediacom cable internet available to them in the county. The company covers the south St. Clair County area. Mediacom is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of St. Clair County.
Mediacom cable download speeds
Mediacom is below average when comparing download speeds to all other internet providers in St. Clair County. Versus other cable providers in the area, Mediacom cable is one of the fastest. There are no different maximum speeds throughout St. Clair County. The fastest plan anyone in St. Clair County can order from Mediacom goes up to 1,000 Mbps, and all St. Clair County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Mediacom cable upload speeds
In St. Clair County download speeds tend to be faster than than upload speeds for Mediacom cable. Compared to other ISPs, Mediacom is below average where upload speeds are concerned, and one of the slowest compared to other St. Clair County cable providers. Mediacom offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in St. Clair County is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
St. Clair County Cable by Area
This information is most helpful to those looking for homes or considering moving to St. Clair County or any of the areas nearby.
How does cable internet in St. Clair County compare to the rest of Illinois?
Cable internet speeds in St. Clair County are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 1,000 Mbps in the county. The state has similar cable availability compared to the county. Average cable coverage in Illinois is 0.00% versus 92.09% in St. Clair County.
What zip codes have cable internet?
Cable internet coverage varies by zip code and neighborhood. Some examples in or around St. Clair County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does cable 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
- St. Louis City, MO: more cable coverage, similar speeds
- St. Louis County, MO: more cable coverage, similar speeds
- Clinton County, IL: less cable coverage, similar speeds
- Marion County, IL: less cable coverage, similar speeds
- Franklin County, MO: less cable coverage, similar speeds
- Gasconade County, MO: less cable coverage, similar speeds
- Wayne County, IL: less cable coverage, similar speeds
- Osage County, MO: less cable coverage, similar speeds
- Edwards County, IL: less cable coverage, similar speeds
- Wabash County, IL: less cable coverage, similar speeds
Counties with Similar Populations
- Horry County, SC: less cable coverage, similar speeds
- Richmond County, GA: more cable coverage, faster speeds
- Richmond City, VA: more cable coverage, faster speeds
- Racine County, WI: more cable coverage, similar speeds
- Onslow County, NC: less cable coverage, similar speeds
- Okaloosa County, FL: less cable coverage, faster speeds
- Niagara County, NY: more cable coverage, similar speeds
- New Hanover County, NC: more cable coverage, similar speeds
- Muscogee County, GA: more cable coverage, faster speeds
- Leon County, FL: more cable coverage, faster speeds