Cell phone coverage map for Sangamon County, IL
Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.
Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.
Loading coverage map...
Cell phone coverage rankings by network in Sangamon County, IL
T-Mobile
- Overall
- 95.7%
- 4G LTE
- 95.7% avg. -90 dBm 4G LTE signal where 4G LTE coverage exists: avg. -90 dBm
- 5G
- 90.6% avg. -87 dBm 5G signal where 5G coverage exists: avg. -87 dBm
- Fast 5G
- 76.8% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
Verizon
- Overall
- 99.1%
- 4G LTE
- 99.0% avg. -89 dBm 4G LTE signal where 4G LTE coverage exists: avg. -89 dBm
- 5G
- 68.2% avg. -90 dBm 5G signal where 5G coverage exists: avg. -90 dBm
- Fast 5G
- 52.1% avg. -87 dBm Fast 5G signal where Fast 5G coverage exists: avg. -87 dBm
AT&T
- Overall
- 98.9%
- 4G LTE
- 98.7% avg. -99 dBm 4G LTE signal where 4G LTE coverage exists: avg. -99 dBm
- 5G
- 93.6% avg. -106 dBm 5G signal where 5G coverage exists: avg. -106 dBm
- Fast 5G
- 61.4% avg. -104 dBm Fast 5G signal where Fast 5G coverage exists: avg. -104 dBm
Coverage varies by neighborhood. Your carrier shouldn’t.
US Mobile lets you switch between all three major networks, so you can choose the one that works best where you actually use your phone.
Pricing, network access, switching terms, and home internet availability may vary.
Coverage by city in Sangamon County, IL
Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.
| City | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Auburn, IL | 100.0% 100.0% 55.1% 41.1% | 100.0% 100.0% 100.0% 96.3% | 100.0% 100.0% 100.0% 98.1% |
| Berlin, IL | 100.0% 100.0% 100.0% 95.7% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 78.3% |
| Buffalo, IL | 100.0% 100.0% 66.7% 0.0% | 100.0% 100.0% 66.7% 66.7% | 100.0% 100.0% 100.0% 100.0% |
| Cantrall, IL | 100.0% 100.0% 0.0% 0.0% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 40.0% 0.0% |
| Chatham, IL | 100.0% 100.0% 87.5% 75.5% | 100.0% 100.0% 100.0% 70.1% | 100.0% 100.0% 98.9% 90.8% |
| Curran, IL | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 95.9% | 100.0% 100.0% 100.0% 100.0% |
| Dawson, IL | 100.0% 100.0% 100.0% 90.0% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 95.0% 80.0% |
| Divernon, IL | 100.0% 100.0% 82.4% 58.8% | 100.0% 100.0% 100.0% 94.1% | 100.0% 100.0% 100.0% 76.5% |
| Glenarm, IL | 100.0% 100.0% 88.2% 81.0% | 100.0% 100.0% 99.5% 50.8% | 100.0% 100.0% 100.0% 90.8% |
| Grandview, IL | 100.0% 100.0% 9.1% 9.1% | 100.0% 100.0% 100.0% 54.5% | 100.0% 100.0% 100.0% 100.0% |
| Illiopolis, IL | 100.0% 100.0% 16.7% 11.1% | 100.0% 100.0% 44.4% 44.4% | 100.0% 100.0% 88.9% 38.9% |
| Jerome, IL | 100.0% 100.0% 100.0% 90.9% | 100.0% 100.0% 100.0% 63.6% | 100.0% 100.0% 100.0% 100.0% |
| Leland Grove, IL | 100.0% 100.0% 73.3% 33.3% | 100.0% 100.0% 100.0% 40.0% | 100.0% 100.0% 100.0% 100.0% |
| Loami, IL | 92.3% 92.3% 50.0% 38.5% | 100.0% 100.0% 96.2% 42.3% | 100.0% 100.0% 100.0% 100.0% |
| Mechanicsburg, IL | 100.0% 100.0% 23.1% 0.0% | 88.5% 88.5% 30.8% 26.9% | 100.0% 100.0% 92.3% 50.0% |
| New Berlin, IL | 100.0% 100.0% 96.4% 96.4% | 100.0% 100.0% 100.0% 75.0% | 100.0% 100.0% 100.0% 100.0% |
| Pawnee, IL | 100.0% 100.0% 87.1% 71.0% | 100.0% 100.0% 100.0% 93.5% | 35.5% 35.5% 25.8% 16.1% |
| Pleasant Plains, IL | 100.0% 100.0% 8.3% 5.6% | 100.0% 100.0% 100.0% 97.2% | 100.0% 100.0% 100.0% 100.0% |
| Riverton, IL | 100.0% 100.0% 75.6% 61.0% | 100.0% 100.0% 100.0% 87.8% | 100.0% 100.0% 100.0% 95.1% |
| Rochester, IL | 100.0% 100.0% 47.8% 30.4% | 100.0% 100.0% 100.0% 97.1% | 100.0% 100.0% 100.0% 92.8% |
| Sherman, IL | 100.0% 100.0% 40.7% 9.9% | 100.0% 100.0% 98.8% 86.4% | 100.0% 100.0% 100.0% 92.6% |
| Southern View, IL | 100.0% 100.0% 87.5% 62.5% | 100.0% 100.0% 100.0% 50.0% | 100.0% 100.0% 100.0% 100.0% |
| Spaulding, IL | 100.0% 100.0% 66.7% 55.6% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 100.0% |
| Springfield, IL | 99.6% 99.6% 76.2% 61.1% | 100.0% 99.9% 99.0% 61.2% | 100.0% 100.0% 99.4% 94.2% |
| Thayer, IL | 100.0% 100.0% 71.4% 57.1% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 85.7% |
| Williamsville, IL | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 95.7% | 100.0% 100.0% 100.0% 91.3% |
| Ashland, IL | 100.0% 100.0% 0.0% 0.0% | 100.0% 100.0% 100.0% 47.4% | 84.2% 84.2% 36.8% 21.1% |
| Virden, IL | 100.0% 100.0% 97.8% 84.8% | 100.0% 100.0% 100.0% 91.3% | 100.0% 100.0% 100.0% 100.0% |
About The Coverage Data
Coverage and signal estimates are derived by Carrierlytics 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 Sangamon County, IL 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.