Cell phone coverage map for Illinois
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Darker areas mean the carrier covers more of that location.
Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.
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Cell phone coverage rankings by network in Illinois
#1
T-Mobile
Coverage Score
75.4
In Illinois
- Overall
- 78.5%
- 4G LTE
- 78.5% avg. -93 dBm 4G LTE signal where 4G LTE coverage exists: avg. -93 dBm
- 5G
- 68.5% avg. -89 dBm 5G signal where 5G coverage exists: avg. -89 dBm
- Fast 5G
- 50.7% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
#2
Verizon
Coverage Score
73.9
In Illinois
- Overall
- 97.5%
- 4G LTE
- 97.5% avg. -91 dBm 4G LTE signal where 4G LTE coverage exists: avg. -91 dBm
- 5G
- 46.4% avg. -91 dBm 5G signal where 5G coverage exists: avg. -91 dBm
- Fast 5G
- 33.0% avg. -88 dBm Fast 5G signal where Fast 5G coverage exists: avg. -88 dBm
#3
AT&T
Coverage Score
71.3
In Illinois
- Overall
- 95.7%
- 4G LTE
- 95.6% avg. -104 dBm 4G LTE signal where 4G LTE coverage exists: avg. -104 dBm
- 5G
- 71.5% avg. -111 dBm 5G signal where 5G coverage exists: avg. -111 dBm
- Fast 5G
- 53.8% avg. -109 dBm Fast 5G signal where Fast 5G coverage exists: avg. -109 dBm
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Coverage by county in Illinois
Counties are shown for statewide comparison. Coverage percentages use land-area only coverage.
| County | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Adams County, IL | 97.8% 97.8% 8.2% 2.7% | 90.2% 90.2% 68.8% 49.6% | 63.8% 63.4% 51.3% 34.9% |
| Alexander County, IL | 88.2% 88.2% 5.8% 2.6% | 89.4% 89.2% 69.7% 47.0% | 31.3% 31.3% 24.1% 17.5% |
| Bond County, IL | 97.8% 97.8% 61.2% 41.9% | 97.4% 97.4% 79.6% 67.3% | 81.7% 81.7% 72.2% 52.5% |
| Boone County, IL | 100.0% 100.0% 65.1% 37.2% | 99.7% 99.7% 81.5% 46.7% | 99.4% 99.4% 96.9% 84.3% |
| Brown County, IL | 93.9% 93.9% 0.0% 0.0% | 77.5% 77.4% 52.3% 31.8% | 35.9% 35.9% 27.1% 16.5% |
| Bureau County, IL | 100.0% 100.0% 38.3% 18.6% | 98.6% 98.6% 55.4% 48.6% | 81.7% 81.7% 69.4% 46.0% |
| Calhoun County, IL | 96.1% 96.1% 18.8% 12.4% | 81.4% 80.7% 52.8% 36.6% | 32.3% 32.3% 17.8% 6.1% |
| Carroll County, IL | 99.8% 99.8% 29.4% 14.6% | 84.4% 84.4% 3.3% 2.7% | 39.0% 38.9% 22.2% 10.4% |
| Cass County, IL | 87.5% 87.5% 0.0% 0.0% | 94.6% 94.6% 78.4% 52.2% | 79.7% 79.7% 66.6% 49.7% |
| Champaign County, IL | 99.8% 99.8% 93.8% 71.0% | 99.9% 99.8% 96.4% 67.7% | 98.5% 98.5% 94.4% 75.5% |
| Christian County, IL | 98.9% 98.9% 56.6% 36.1% | 99.1% 99.0% 93.7% 73.6% | 89.5% 89.5% 77.1% 50.0% |
| Clark County, IL | 95.0% 94.9% 38.5% 28.6% | 83.8% 83.7% 55.8% 35.6% | 44.7% 44.7% 35.1% 21.2% |
| Clay County, IL | 99.1% 99.1% 42.0% 35.4% | 95.2% 95.2% 51.6% 44.2% | 75.0% 75.0% 61.7% 40.9% |
| Clinton County, IL | 97.2% 97.2% 73.0% 55.0% | 99.0% 99.0% 89.2% 66.7% | 87.7% 87.7% 80.3% 62.5% |
| Coles County, IL | 97.6% 97.6% 65.5% 58.5% | 97.7% 97.7% 81.9% 66.1% | 87.0% 87.0% 79.1% 67.6% |
| Cook County, IL | 100.0% 100.0% 99.1% 92.0% | 99.9% 99.9% 99.2% 78.3% | 99.9% 99.9% 99.2% 96.6% |
| Crawford County, IL | 96.2% 96.1% 48.9% 35.5% | 85.0% 85.0% 30.1% 18.1% | 27.6% 27.6% 21.8% 11.9% |
| Cumberland County, IL | 99.5% 99.5% 58.1% 43.1% | 99.4% 99.4% 75.9% 66.8% | 69.3% 69.3% 56.6% 39.1% |
| De Witt County, IL | 99.3% 99.3% 67.6% 53.3% | 99.7% 99.7% 94.0% 64.5% | 94.8% 94.7% 92.6% 74.4% |
| DeKalb County, IL | 100.0% 100.0% 70.2% 45.6% | 99.5% 99.5% 85.3% 57.7% | 99.5% 99.5% 98.5% 93.2% |
| Douglas County, IL | 99.7% 99.7% 80.5% 63.1% | 99.8% 99.8% 88.4% 76.2% | 94.4% 94.4% 88.4% 65.7% |
| DuPage County, IL | 100.0% 100.0% 99.8% 96.4% | 100.0% 99.9% 99.5% 70.4% | 100.0% 100.0% 99.8% 98.6% |
| Edgar County, IL | 97.0% 97.0% 71.6% 50.4% | 94.2% 94.1% 58.0% 44.3% | 57.2% 57.2% 41.3% 19.3% |
| Edwards County, IL | 99.9% 99.9% 4.1% 2.3% | 99.7% 99.7% 69.6% 59.3% | 50.2% 50.2% 35.2% 19.2% |
| Effingham County, IL | 98.8% 98.8% 48.0% 33.8% | 94.1% 94.1% 67.4% 50.7% | 80.5% 80.5% 68.6% 49.8% |
| Fayette County, IL | 92.1% 91.9% 49.7% 30.9% | 93.2% 93.2% 64.1% 55.2% | 65.2% 65.2% 52.5% 33.3% |
| Ford County, IL | 99.9% 99.9% 35.7% 19.7% | 100.0% 100.0% 95.3% 77.0% | 86.6% 86.6% 69.1% 41.3% |
| Franklin County, IL | 99.8% 99.8% 40.4% 25.8% | 99.5% 99.5% 90.7% 65.6% | 61.2% 61.2% 48.3% 29.4% |
| Fulton County, IL | 91.5% 91.4% 24.0% 17.4% | 96.3% 96.3% 49.3% 26.1% | 79.7% 79.7% 66.1% 45.6% |
| Gallatin County, IL | 86.5% 86.5% 18.0% 7.9% | 87.4% 87.4% 31.4% 24.1% | 55.2% 55.2% 46.0% 29.9% |
| Greene County, IL | 97.2% 97.2% 4.1% 2.2% | 96.5% 96.4% 79.2% 61.0% | 63.9% 63.9% 50.6% 33.1% |
| Grundy County, IL | 100.0% 100.0% 82.7% 58.9% | 99.6% 99.6% 92.7% 80.1% | 94.5% 94.5% 88.5% 69.9% |
| Hamilton County, IL | 99.3% 99.3% 12.5% 5.2% | 98.9% 98.9% 71.0% 63.5% | 59.2% 58.6% 48.0% 26.3% |
| Hancock County, IL | 94.7% 94.7% 30.2% 15.6% | 82.4% 82.4% 11.8% 9.4% | 66.9% 66.9% 47.8% 25.9% |
| Hardin County, IL | 79.0% 79.0% 0.0% 0.0% | 71.0% 70.9% 21.6% 19.5% | 35.5% 35.5% 24.6% 14.2% |
| Henderson County, IL | 94.7% 94.7% 4.3% 0.1% | 84.2% 84.2% 25.7% 23.0% | 73.1% 73.1% 49.3% 26.9% |
| Henry County, IL | 100.0% 100.0% 44.9% 24.0% | 99.3% 99.3% 58.4% 40.8% | 95.4% 95.4% 83.9% 59.1% |
| Iroquois County, IL | 99.9% 99.9% 55.2% 28.2% | 99.2% 99.2% 89.7% 83.9% | 82.3% 82.3% 62.5% 37.3% |
| Jackson County, IL | 93.8% 93.8% 20.2% 11.8% | 89.4% 89.3% 54.8% 39.0% | 62.4% 62.4% 53.1% 37.2% |
| Jasper County, IL | 97.0% 97.0% 16.8% 7.8% | 94.8% 94.7% 66.3% 58.5% | 46.8% 46.8% 36.6% 18.4% |
| Jefferson County, IL | 98.9% 98.9% 22.7% 14.2% | 99.2% 99.2% 82.0% 63.4% | 66.5% 66.5% 52.4% 34.0% |
| Jersey County, IL | 96.1% 96.1% 12.2% 3.2% | 91.8% 91.7% 55.5% 43.4% | 61.5% 61.5% 50.9% 34.9% |
| Jo Daviess County, IL | 99.5% 99.5% 21.2% 11.2% | 74.8% 68.2% 24.5% 17.3% | 68.3% 68.3% 53.1% 34.3% |
| Johnson County, IL | 96.8% 96.8% 12.3% 6.8% | 87.2% 87.1% 53.4% 37.2% | 50.7% 50.7% 39.8% 25.0% |
| Kane County, IL | 100.0% 100.0% 98.7% 86.6% | 100.0% 100.0% 97.7% 78.9% | 100.0% 100.0% 99.7% 97.2% |
| Kankakee County, IL | 100.0% 100.0% 88.7% 60.5% | 98.8% 98.8% 91.8% 83.4% | 96.0% 96.0% 88.3% 72.9% |
| Kendall County, IL | 100.0% 100.0% 99.3% 93.3% | 99.9% 99.9% 90.9% 62.7% | 99.9% 99.9% 99.7% 96.9% |
| Knox County, IL | 95.3% 95.2% 36.1% 27.9% | 96.8% 96.8% 63.2% 43.8% | 77.5% 77.5% 66.8% 48.1% |
| Lake County, IL | 100.0% 100.0% 98.8% 87.6% | 99.9% 99.9% 98.7% 71.2% | 99.9% 99.9% 99.4% 96.5% |
| LaSalle County, IL | 99.9% 99.9% 74.9% 47.4% | 99.5% 99.5% 91.8% 64.6% | 94.1% 94.1% 88.8% 72.8% |
| Lawrence County, IL | 99.9% 99.8% 64.1% 47.8% | 97.0% 97.0% 62.1% 59.2% | 45.8% 45.8% 38.1% 21.7% |
| Lee County, IL | 100.0% 100.0% 55.1% 29.8% | 97.0% 96.9% 42.7% 30.2% | 86.7% 86.6% 79.0% 56.7% |
| Livingston County, IL | 99.9% 99.9% 66.6% 45.3% | 99.7% 99.7% 93.0% 78.7% | 89.1% 89.1% 76.9% 53.0% |
| Logan County, IL | 99.2% 99.2% 59.7% 43.3% | 98.9% 98.9% 90.7% 59.1% | 94.4% 94.4% 88.0% 66.7% |
| Macon County, IL | 99.7% 99.7% 66.1% 53.6% | 99.8% 99.8% 93.7% 66.1% | 99.6% 99.5% 98.1% 86.7% |
| Macoupin County, IL | 94.7% 94.6% 27.5% 19.1% | 96.8% 96.8% 67.3% 40.7% | 63.6% 63.6% 51.5% 32.4% |
| Madison County, IL | 98.9% 98.8% 56.1% 39.2% | 99.6% 99.5% 93.2% 63.6% | 93.5% 93.5% 88.0% 73.9% |
| Marion County, IL | 94.0% 93.9% 61.0% 50.2% | 96.1% 96.1% 69.8% 55.9% | 77.5% 77.5% 65.9% 47.1% |
| Marshall County, IL | 99.6% 99.6% 53.1% 24.4% | 97.9% 97.9% 76.2% 62.4% | 72.4% 72.4% 47.0% 25.3% |
| Mason County, IL | 95.4% 95.3% 42.9% 29.3% | 98.5% 98.5% 80.8% 67.8% | 77.8% 77.8% 63.5% 40.9% |
| Massac County, IL | 98.5% 98.5% 17.7% 7.7% | 94.3% 94.2% 67.9% 50.6% | 79.3% 79.3% 66.9% 45.9% |
| McDonough County, IL | 94.2% 94.2% 1.6% 1.4% | 95.0% 95.0% 59.7% 29.1% | 91.0% 91.0% 79.6% 58.1% |
| McHenry County, IL | 100.0% 100.0% 97.7% 83.5% | 99.8% 99.7% 93.6% 77.3% | 99.6% 99.6% 98.4% 89.9% |
| McLean County, IL | 99.9% 99.9% 64.7% 54.7% | 100.0% 100.0% 96.3% 68.4% | 97.8% 97.8% 93.5% 80.3% |
| Menard County, IL | 96.2% 96.1% 34.5% 20.8% | 98.8% 98.8% 89.7% 74.0% | 82.9% 82.9% 69.7% 44.9% |
| Mercer County, IL | 98.7% 98.7% 16.1% 7.6% | 84.9% 84.9% 7.3% 4.4% | 83.7% 83.7% 70.3% 43.5% |
| Monroe County, IL | 94.8% 94.8% 58.4% 44.1% | 97.5% 97.1% 77.3% 39.6% | 81.4% 81.4% 72.6% 52.2% |
| Montgomery County, IL | 94.7% 94.7% 42.9% 25.5% | 96.8% 96.7% 80.0% 67.0% | 90.9% 90.9% 78.5% 55.6% |
| Morgan County, IL | 96.8% 96.8% 22.0% 11.6% | 98.9% 98.9% 84.7% 54.0% | 90.0% 90.0% 80.1% 61.3% |
| Moultrie County, IL | 100.0% 100.0% 27.5% 23.2% | 99.8% 99.8% 85.6% 74.8% | 95.6% 95.6% 88.8% 59.9% |
| Ogle County, IL | 100.0% 100.0% 46.0% 28.4% | 92.9% 92.9% 31.5% 20.9% | 87.7% 87.7% 77.7% 58.4% |
| Peoria County, IL | 96.8% 96.7% 51.2% 34.2% | 98.4% 98.4% 70.7% 49.5% | 91.6% 91.6% 83.0% 66.3% |
| Perry County, IL | 99.9% 99.9% 16.0% 8.4% | 99.4% 99.4% 82.1% 70.2% | 65.4% 65.4% 49.7% 28.2% |
| Piatt County, IL | 99.7% 99.7% 66.4% 50.3% | 99.8% 99.8% 98.5% 75.7% | 97.0% 97.0% 89.8% 65.0% |
| Pike County, IL | 98.7% 98.7% 2.0% 1.3% | 91.3% 91.1% 70.1% 52.0% | 63.3% 63.3% 47.7% 29.1% |
| Pope County, IL | 73.4% 73.4% 0.1% 0.0% | 56.1% 56.1% 23.5% 19.3% | 23.1% 23.1% 15.0% 7.9% |
| Pulaski County, IL | 99.6% 99.6% 15.4% 10.2% | 99.9% 99.9% 83.2% 66.5% | 58.7% 58.7% 45.9% 28.4% |
| Putnam County, IL | 99.9% 99.9% 25.2% 9.0% | 94.7% 94.6% 64.8% 42.9% | 61.6% 61.6% 48.3% 25.9% |
| Randolph County, IL | 97.4% 97.4% 20.7% 10.5% | 97.1% 97.1% 79.2% 59.6% | 74.6% 74.3% 62.5% 41.2% |
| Richland County, IL | 99.3% 99.3% 53.3% 44.2% | 99.0% 99.0% 74.6% 68.5% | 54.7% 54.7% 45.5% 26.2% |
| Rock Island, IL County | 99.9% 99.9% 48.4% 29.4% | 87.3% 87.2% 41.1% 28.8% | 90.0% 90.0% 79.0% 57.7% |
| Saline County, IL | 96.1% 96.1% 21.4% 11.9% | 96.0% 96.0% 73.3% 60.3% | 66.7% 66.7% 56.9% 39.9% |
| Sangamon County, IL | 99.1% 99.0% 68.2% 52.1% | 98.9% 98.7% 93.6% 61.4% | 95.7% 95.7% 90.6% 76.8% |
| Schuyler County, IL | 73.7% 73.7% 0.1% 0.0% | 82.3% 82.3% 24.4% 20.0% | 39.2% 39.2% 24.3% 15.8% |
| Scott County, IL | 98.4% 98.4% 18.0% 9.3% | 98.7% 98.7% 86.9% 62.3% | 81.6% 81.6% 70.1% 47.3% |
| Shelby County, IL | 94.1% 94.0% 30.6% 17.3% | 97.7% 97.7% 78.5% 63.6% | 74.4% 74.4% 61.6% 41.9% |
| St. Clair County, IL | 98.9% 98.9% 83.9% 68.8% | 99.0% 98.5% 94.2% 62.1% | 93.0% 93.0% 88.8% 76.0% |
| Stark County, IL | 99.6% 99.6% 41.8% 21.6% | 98.5% 98.5% 77.2% 67.8% | 88.7% 88.7% 72.0% 36.2% |
| Stephenson County, IL | 99.7% 99.7% 30.1% 15.2% | 86.2% 85.5% 20.7% 16.0% | 76.8% 76.8% 61.8% 41.7% |
| Tazewell County, IL | 99.5% 99.5% 69.8% 59.2% | 99.5% 99.5% 81.7% 53.6% | 96.0% 96.0% 90.5% 73.2% |
| Union County, IL | 96.4% 96.4% 15.2% 9.4% | 92.1% 91.5% 71.7% 46.7% | 56.2% 56.2% 44.3% 26.8% |
| Vermilion County, IL | 96.9% 96.8% 59.2% 37.6% | 99.5% 99.5% 93.4% 65.5% | 76.4% 76.4% 59.9% 36.8% |
| Wabash County, IL | 98.3% 98.3% 4.6% 1.3% | 98.8% 98.8% 59.0% 43.5% | 20.7% 20.7% 9.6% 0.6% |
| Warren County, IL | 98.6% 98.5% 35.9% 25.5% | 96.4% 96.4% 52.0% 41.7% | 90.1% 90.1% 73.5% 45.8% |
| Washington County, IL | 99.3% 99.3% 25.9% 12.7% | 99.2% 99.2% 91.5% 69.9% | 78.9% 78.9% 68.9% 49.6% |
| Wayne County, IL | 97.1% 97.0% 19.8% 11.1% | 98.2% 98.2% 62.5% 55.4% | 47.2% 47.1% 38.1% 21.2% |
| White County, IL | 98.9% 98.9% 19.3% 9.3% | 98.2% 98.2% 68.2% 53.5% | 59.0% 59.0% 42.0% 25.3% |
| Whiteside County, IL | 99.8% 99.8% 47.3% 25.3% | 98.1% 98.0% 44.2% 32.8% | 91.3% 91.3% 83.9% 65.5% |
| Will County, IL | 100.0% 100.0% 99.5% 90.5% | 99.7% 99.7% 94.2% 79.8% | 99.1% 99.1% 97.6% 91.5% |
| Williamson County, IL | 99.5% 99.5% 35.0% 24.7% | 97.7% 97.7% 79.7% 49.3% | 67.0% 67.0% 56.9% 41.0% |
About The Coverage Data
Coverage and signal estimates are derived by Compare Wireless Carriers from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of Illinois where that carrier has coverage.
If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.