Illinois · County profile
Internet providers in St. Clair County, IL
Spectrum, T-Mobile, AT&T and 1 other providers report service to most homes in St. Clair County; 2 more providers report service in some areas. Satellite service is available almost everywhere.
Check what's available at your address
Type your ZIP code to see the providers reported near you in St. Clair County. Then call to confirm plans at your exact address.
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Who serves this area
Providers that serve St. Clair County
Each card says whether the provider reports service to most homes here or only in some areas. Many homes can choose more than one provider; call to check plans and prices at your address.
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SpectrumCable
Available
Reports service to most homes in St. Clair County.
Call to check plans and price (815) 934-8169 -
T-MobileFixed wireless
Available
Reports service to most homes in St. Clair County.
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AT&T
Available
Reports service to most homes in St. Clair County.
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Verizon
Available
Reports service to most homes in St. Clair County.
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Wisper Internet
Available in some areas
Reports service to part of St. Clair County; check your street.
Call to check plans and price (815) 934-8169 -
WH i3B Bidco LLC/WH i3B Topco, LLC
Available in some areas
Reports service to part of St. Clair County; check your street.
Call to check plans and price (815) 934-8169
6 more providers report smaller service areas; see the table.
Available almost everywhere satellite, shown separately
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HughesnetSatellite
Available almost everywhere by satellite
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StarlinkSatellite
Available almost everywhere by satellite
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ViasatSatellite
Available almost everywhere by satellite
Show all 15 providers as a table
| Provider | Availability | Main technology | Company |
|---|---|---|---|
| Spectrum | Available | Cable | Charter Communications |
| T-Mobile | Available | Fixed wireless | T-Mobile USA, Inc. |
| AT&T | Available | Not specified | AT&T Inc. |
| Verizon | Available | Not specified | Verizon Communications Inc. |
| Wisper Internet | Available in some areas | Not specified | Wisper ISP, Inc. |
| WH i3B Bidco LLC/WH i3B Topco, LLC | Available in some areas | Not specified | WH i3B Bidco LLC/WH i3B Topco, LLC |
| Frontier | Reported for a few homes only | Not specified | Frontier Communications Corporation |
| Delta Communications, LLC | Reported for a few homes only | Not specified | Delta Communications, LLC |
| HTC Holding Co. | Reported for a few homes only | Not specified | HTC Holding Co. |
| PCs for People | Reported for a few homes only | Not specified | PCs for People |
| Sparklight | Reported for a few homes only | Cable | Cable One, Inc. |
| Mediacom | Reported for a few homes only | Cable | Mediacom Communications Corp. |
| Hughesnet | Available almost everywhere (satellite) | Satellite | EchoStar Corporation |
| Starlink | Available almost everywhere (satellite) | Satellite | Space Exploration Technologies Corp. |
| Viasat | Available almost everywhere (satellite) | Satellite | Viasat, Inc. |
Source: FCC National Broadband Map, provider filings as of December 30, 2025 · How we use the data
Town by town
Towns and cities in St. Clair County
| Town | Locations | Providers |
|---|---|---|
| Belleville | 21,556 | 11 |
| Caseyville | 2,177 | 9 |
| Collinsville (partly in St. Clair County) | 12,477 | 10 |
| Columbia (partly in St. Clair County) | 4,523 | 9 |
| Dupo | 2,021 | 9 |
| East St. Louis | 10,621 | 8 |
| Fairmont City | 1,043 | 8 |
| Fairview Heights | 7,998 | 9 |
| Freeburg | 2,053 | 8 |
| Lebanon | 1,998 | 8 |
| Madison (partly in St. Clair County) | 1,885 | 8 |
| Marissa | 1,032 | 8 |
| Mascoutah | 3,939 | 8 |
| Millstadt | 2,024 | 9 |
| New Athens | 997 | 8 |
| New Baden (partly in St. Clair County) | 1,356 | 10 |
| O'Fallon | 13,910 | 9 |
| Scott AFB | 1,252 | 7 |
| Shiloh | 6,475 | 9 |
| Smithton | 1,708 | 9 |
| Swansea | 7,085 | 8 |
| Washington Park | 1,747 | 7 |
Where this comes fromFCC filings and how to check one address
Check service at your address
The figures on this page summarize what providers reported to the FCC for all homes in St. Clair County. They do not confirm that any provider serves a particular address, and providers' reports can overstate coverage. Two ways to check your own address:
- Search your address on the FCC National Broadband Map.
- Call (815) 934-8169 and we will look up the providers and plans available at your address. We are an independent service, not your provider.
Sources
Provider availability comes from the FCC National Broadband Map (provider filings as of December 30, 2025): a provider is "available" where its filing covers most homes and "available in some areas" where it covers part of them. Household counts come from the Census Bureau's American Community Survey (ACS 5-year 2020-2024), which are estimates with margins of error.
- FCC National Broadband Map — Broadband Data Collection public data (D25 filing, released 2026-09-29). Data as of December 30, 2025; retrieved October 9, 2026.
- U.S. Census Bureau, American Community Survey 5-year 2020-2024 estimates (tables B01003, B25001, B19013, B28002). Data as of ACS 5-year 2020-2024; retrieved October 9, 2026.
- U.S. Census Bureau 2024 Gazetteer Files (town locations) and 2020 Census block files (which county each town lies in). Data as of January 1, 2024 boundaries (Gazetteer); 2020 Census blocks; retrieved October 9, 2026.
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