Adams County, IL Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Adams County, IL

Coverage rankings for Adams County, IL

AT&T currently ranks first for coverage in this area, with a coverage score of 75.2. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1AT&T75.290.2%90.2%68.8%49.6% -113 dBm
2T-Mobile61.263.8%63.4%51.3%34.9% -94 dBm
3Verizon58.197.8%97.8%8.2%2.7% -95 dBm

Scores include coverage area, network type, and average signal strength.

Cell phone coverage map for Adams 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.

Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.

Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Compare Wireless Carriers.

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Cell phone coverage by network in Adams County, IL

#1

AT&T

Coverage Score 75.2
In Adams County, IL
Overall
90.2%
4G LTE
90.2%
5G
68.8%
Fast 5G
49.6%
Average Signal -113 dBm
#2

T-Mobile

Coverage Score 61.2
In Adams County, IL
Overall
63.8%
4G LTE
63.4%
5G
51.3%
Fast 5G
34.9%
Average Signal -94 dBm
#3

Verizon

Coverage Score 58.1
In Adams County, IL
Overall
97.8%
4G LTE
97.8%
5G
8.2%
Fast 5G
2.7%
Average Signal -95 dBm
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Coverage by city in Adams County, IL

Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.

CityVerizonAT&TT-Mobile
Adams, IL 100.0% 100.0% 0.0% 0.0% -95 dBm 100.0% 100.0% 86.0% 80.7% -111 dBm 63.2% 63.2% 49.1% 29.8% -100 dBm
Beverly, IL 100.0% 100.0% 0.0% 0.0% -90 dBm 97.1% 97.1% 62.9% 22.9% -119 dBm 68.6% 68.6% 20.0% 0.0% -107 dBm
Bloomfield, IL 100.0% 100.0% 21.4% 0.0% -85 dBm 100.0% 100.0% 100.0% 64.3% -106 dBm 100.0% 100.0% 100.0% 92.9% -91 dBm
Burton, IL 100.0% 100.0% 0.0% 0.0% -101 dBm 100.0% 100.0% 100.0% 90.0% -110 dBm 50.0% 50.0% 0.0% 0.0% -110 dBm
Camp Point, IL 100.0% 100.0% 0.0% 0.0% -83 dBm 100.0% 100.0% 100.0% 87.1% -101 dBm 100.0% 100.0% 100.0% 83.9% -88 dBm
Clayton, IL 100.0% 100.0% 0.0% 0.0% -78 dBm 100.0% 100.0% 100.0% 100.0% -107 dBm 100.0% 100.0% 100.0% 77.3% -93 dBm
Coatsburg, IL 100.0% 100.0% 0.0% 0.0% -70 dBm 100.0% 100.0% 100.0% 33.3% -110 dBm 100.0% 100.0% 100.0% 33.3% -97 dBm
Columbus, IL 100.0% 100.0% 0.0% 0.0% -94 dBm 100.0% 100.0% 60.0% 40.0% -108 dBm 40.0% 40.0% 40.0% 0.0% -100 dBm
Fall Creek, IL 100.0% 100.0% 0.0% 0.0% -100 dBm 100.0% 100.0% 100.0% 100.0% -110 dBm 100.0% 100.0% 50.0% 0.0% -100 dBm
Fowler, IL 100.0% 100.0% 100.0% 0.0% -103 dBm 100.0% 100.0% 100.0% 100.0% -87 dBm 100.0% 100.0% 100.0% 100.0% -87 dBm
Golden, IL 100.0% 100.0% 0.0% 0.0% -81 dBm 100.0% 100.0% 100.0% 94.1% -114 dBm 100.0% 100.0% 94.1% 58.8% -95 dBm
Kingston Census Place 1740052, IL 100.0% 100.0% 0.0% 0.0% -94 dBm 80.0% 80.0% 20.0% 0.0% -118 dBm N/A N/A N/A N/A N/A
La Prairie, IL 100.0% 100.0% 40.0% 0.0% -90 dBm 100.0% 100.0% 100.0% 80.0% -120 dBm 80.0% 80.0% 60.0% 0.0% -103 dBm
Liberty, IL 100.0% 100.0% 0.0% 0.0% -68 dBm 90.0% 90.0% 30.0% 0.0% -120 dBm N/A N/A N/A N/A N/A
Lima, IL 100.0% 100.0% 0.0% 0.0% -55 dBm 100.0% 100.0% 50.0% 50.0% -120 dBm 50.0% 50.0% 50.0% 0.0% -100 dBm
Loraine, IL 100.0% 100.0% 0.0% 0.0% -83 dBm 100.0% 100.0% 50.0% 5.0% -118 dBm 5.0% 5.0% 5.0% 0.0% -100 dBm
Marcelline, IL 100.0% 100.0% 0.0% 0.0% -90 dBm 100.0% 100.0% 100.0% 0.0% -100 dBm 100.0% 100.0% 0.0% 0.0% -110 dBm
Mendon, IL 100.0% 100.0% 0.0% 0.0% -87 dBm 100.0% 100.0% 100.0% 78.9% -107 dBm 68.4% 68.4% 26.3% 5.3% -102 dBm
Meyer, IL 100.0% 100.0% 75.0% 50.0% -90 dBm 100.0% 100.0% 75.0% 75.0% -115 dBm 100.0% 100.0% 100.0% 100.0% -83 dBm
Paloma, IL 100.0% 100.0% 0.0% 0.0% -80 dBm 100.0% 100.0% 100.0% 66.7% -115 dBm 100.0% 100.0% 100.0% 100.0% -83 dBm
Payson, IL 100.0% 100.0% 0.0% 0.0% -80 dBm 100.0% 100.0% 100.0% 100.0% -102 dBm 100.0% 100.0% 100.0% 96.7% -85 dBm
Plainville, IL 100.0% 100.0% 0.0% 0.0% -100 dBm 100.0% 100.0% 100.0% 60.0% -114 dBm 60.0% 60.0% 20.0% 0.0% -103 dBm
Quincy, IL 100.0% 100.0% 23.3% 13.9% -84 dBm 100.0% 100.0% 100.0% 90.6% -93 dBm 100.0% 100.0% 100.0% 99.0% -81 dBm
Richfield, IL 100.0% 100.0% 0.0% 0.0% -98 dBm 92.3% 92.3% 46.2% 15.4% -119 dBm 61.5% 61.5% 30.8% 7.7% -101 dBm
Ursa, IL 100.0% 100.0% 0.0% 0.0% -89 dBm 100.0% 100.0% 100.0% 47.4% -98 dBm 68.4% 68.4% 26.3% 10.5% -102 dBm

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 Adams 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.