Coverage rankings for McHenry County, IL
T-Mobile currently ranks first for coverage in this area, with a coverage score of 97.6. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.
| Rank | Carrier | Score | Overall | 4G LTE | 5G | Fast 5G | Average Signal |
|---|---|---|---|---|---|---|---|
| 1 | T-Mobile | 97.6 | 99.6% | 99.6% | 98.4% | 89.9% | -84 dBm |
| 2 | Verizon | 95.4 | 100.0% | 100.0% | 97.7% | 83.5% | -91 dBm |
| 3 | AT&T | 89.3 | 99.8% | 99.7% | 93.6% | 77.3% | -109 dBm |
Scores include coverage area, network type, and average signal strength.
Cell phone coverage map for McHenry 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
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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 Compare Wireless Carriers.
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Cell phone coverage by network in McHenry County, IL
#1
T-Mobile
Coverage Score 97.6
In McHenry County, IL
- Overall
- 99.6%
- 4G LTE
- 99.6%
- 5G
- 98.4%
- Fast 5G
- 89.9%
Average Signal -84 dBm
#2
Verizon
Coverage Score 95.4
In McHenry County, IL
- Overall
- 100.0%
- 4G LTE
- 100.0%
- 5G
- 97.7%
- Fast 5G
- 83.5%
Average Signal -91 dBm
#3
AT&T
Coverage Score 89.3
In McHenry County, IL
- Overall
- 99.8%
- 4G LTE
- 99.7%
- 5G
- 93.6%
- Fast 5G
- 77.3%
Average Signal -109 dBm
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Coverage by city in McHenry County, IL
Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.
| City | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Alden, IL | 100.0% 100.0% 100.0% 100.0% -73 dBm | 100.0% 100.0% 100.0% 100.0% -88 dBm | 100.0% 100.0% 100.0% 100.0% -83 dBm |
| Algonquin, IL | 100.0% 100.0% 98.3% 90.4% -85 dBm | 100.0% 100.0% 100.0% 76.2% -98 dBm | 100.0% 100.0% 100.0% 100.0% -75 dBm |
| Big Foot Prairie, IL | 100.0% 100.0% 100.0% 100.0% -78 dBm | 100.0% 100.0% 83.3% 83.3% -118 dBm | 100.0% 100.0% 100.0% 100.0% -73 dBm |
| Bull Valley, IL | 100.0% 100.0% 97.0% 75.8% -94 dBm | 99.2% 98.7% 88.6% 63.6% -109 dBm | 97.0% 97.0% 89.4% 78.0% -85 dBm |
| Burtons Bridge, IL | 100.0% 100.0% 100.0% 100.0% -90 dBm | 100.0% 100.0% 100.0% 100.0% -103 dBm | 100.0% 100.0% 100.0% 100.0% -83 dBm |
| Cary, IL | 100.0% 100.0% 100.0% 97.5% -86 dBm | 100.0% 100.0% 99.4% 65.2% -101 dBm | 100.0% 100.0% 100.0% 99.4% -77 dBm |
| Chemung, IL | 100.0% 100.0% 85.7% 57.1% -101 dBm | 100.0% 100.0% 100.0% 100.0% -111 dBm | 100.0% 100.0% 100.0% 28.6% -96 dBm |
| Coral, IL | 100.0% 100.0% 100.0% 0.0% -100 dBm | 100.0% 100.0% 100.0% 100.0% -100 dBm | 100.0% 100.0% 100.0% 100.0% -80 dBm |
| Crystal Lake, IL | 100.0% 100.0% 99.8% 96.5% -85 dBm | 100.0% 100.0% 99.8% 73.1% -101 dBm | 100.0% 100.0% 100.0% 100.0% -76 dBm |
| Fox River Grove, IL | 100.0% 100.0% 100.0% 97.6% -83 dBm | 100.0% 100.0% 100.0% 88.1% -97 dBm | 100.0% 100.0% 100.0% 95.2% -80 dBm |
| Franklinville, IL | 100.0% 100.0% 100.0% 100.0% -90 dBm | 100.0% 100.0% 100.0% 75.0% -118 dBm | 100.0% 100.0% 100.0% 100.0% -93 dBm |
| Greenwood, IL | 100.0% 100.0% 86.4% 36.4% -102 dBm | 100.0% 100.0% 97.0% 78.8% -112 dBm | 97.0% 97.0% 87.9% 63.6% -94 dBm |
| Harmony, IL | 100.0% 100.0% 100.0% 100.0% -93 dBm | 100.0% 100.0% 100.0% 100.0% -114 dBm | 100.0% 100.0% 100.0% 100.0% -66 dBm |
| Hartland, IL | 100.0% 100.0% 100.0% 100.0% -94 dBm | 100.0% 100.0% 100.0% 87.5% -110 dBm | 100.0% 100.0% 75.0% 37.5% -100 dBm |
| Harvard, IL | 100.0% 100.0% 100.0% 90.6% -91 dBm | 100.0% 100.0% 97.0% 95.1% -109 dBm | 100.0% 100.0% 100.0% 99.5% -76 dBm |
| Hebron, IL | 100.0% 100.0% 100.0% 100.0% -84 dBm | 100.0% 100.0% 100.0% 96.0% -100 dBm | 100.0% 100.0% 100.0% 100.0% -78 dBm |
| Holiday Hills, IL | 100.0% 100.0% 100.0% 89.5% -94 dBm | 100.0% 100.0% 100.0% 100.0% -90 dBm | 100.0% 100.0% 100.0% 100.0% -74 dBm |
| Huntley, IL | 100.0% 100.0% 100.0% 99.4% -85 dBm | 100.0% 100.0% 100.0% 69.7% -101 dBm | 100.0% 100.0% 100.0% 93.8% -85 dBm |
| Island Lake, IL | 100.0% 100.0% 100.0% 93.9% -89 dBm | 100.0% 100.0% 98.8% 64.6% -108 dBm | 100.0% 100.0% 100.0% 100.0% -82 dBm |
| Johnsburg, IL | 100.0% 100.0% 100.0% 86.1% -92 dBm | 100.0% 99.4% 91.7% 56.1% -109 dBm | 100.0% 100.0% 100.0% 95.0% -84 dBm |
| Lake In The Hills, IL | 100.0% 100.0% 100.0% 99.2% -84 dBm | 100.0% 100.0% 100.0% 63.9% -102 dBm | 100.0% 100.0% 100.0% 100.0% -77 dBm |
| Lakemoor, IL | 100.0% 100.0% 100.0% 88.6% -88 dBm | 100.0% 100.0% 100.0% 82.9% -104 dBm | 100.0% 100.0% 100.0% 100.0% -75 dBm |
| Lakewood Census Place 1741651, IL | 100.0% 100.0% 99.1% 95.3% -89 dBm | 100.0% 100.0% 100.0% 76.6% -106 dBm | 100.0% 100.0% 100.0% 98.1% -80 dBm |
| Lawrence, IL | 100.0% 100.0% 100.0% 50.0% -99 dBm | 100.0% 100.0% 100.0% 100.0% -115 dBm | 100.0% 100.0% 100.0% 100.0% -88 dBm |
| Marengo, IL | 100.0% 100.0% 100.0% 96.3% -89 dBm | 100.0% 100.0% 100.0% 99.1% -106 dBm | 100.0% 100.0% 98.2% 94.5% -86 dBm |
| McCullom Lake, IL | 100.0% 100.0% 100.0% 100.0% -96 dBm | 100.0% 100.0% 100.0% 33.3% -114 dBm | 100.0% 100.0% 100.0% 100.0% -89 dBm |
| Mchenry, IL | 100.0% 100.0% 99.7% 94.5% -85 dBm | 100.0% 99.7% 100.0% 88.8% -100 dBm | 100.0% 100.0% 100.0% 99.7% -78 dBm |
| Oakwood Hills, IL | 100.0% 100.0% 100.0% 84.0% -94 dBm | 100.0% 100.0% 100.0% 56.0% -109 dBm | 100.0% 100.0% 100.0% 100.0% -83 dBm |
| Pistakee Highlands, IL | 100.0% 100.0% 100.0% 100.0% -86 dBm | 100.0% 100.0% 85.3% 58.8% -113 dBm | 100.0% 100.0% 100.0% 100.0% -80 dBm |
| Prairie Grove, IL | 100.0% 100.0% 100.0% 89.3% -89 dBm | 100.0% 100.0% 100.0% 74.5% -103 dBm | 100.0% 100.0% 100.0% 98.7% -81 dBm |
| Richmond, IL | 100.0% 100.0% 98.1% 84.1% -93 dBm | 100.0% 100.0% 75.7% 72.0% -113 dBm | 100.0% 100.0% 100.0% 90.7% -87 dBm |
| Ridgefield, IL | 100.0% 100.0% 100.0% 85.7% -89 dBm | 100.0% 100.0% 100.0% 100.0% -90 dBm | 100.0% 100.0% 100.0% 100.0% -71 dBm |
| Riley, IL | 100.0% 100.0% 100.0% 100.0% -90 dBm | 100.0% 100.0% 100.0% 100.0% -108 dBm | 100.0% 100.0% 100.0% 50.0% -95 dBm |
| Ringwood, IL | 100.0% 100.0% 100.0% 89.2% -90 dBm | 100.0% 98.9% 100.0% 51.6% -113 dBm | 100.0% 100.0% 100.0% 100.0% -82 dBm |
| Solon Mills, IL | 100.0% 100.0% 100.0% 75.0% -100 dBm | 100.0% 100.0% 25.0% 0.0% -108 dBm | 100.0% 100.0% 100.0% 100.0% -70 dBm |
| Spring Grove, IL | 100.0% 100.0% 86.1% 67.7% -93 dBm | 100.0% 100.0% 81.2% 72.6% -113 dBm | 100.0% 100.0% 99.1% 94.2% -81 dBm |
| Trout Valley, IL | 100.0% 100.0% 100.0% 60.0% -96 dBm | 100.0% 100.0% 100.0% 30.0% -115 dBm | 100.0% 100.0% 100.0% 100.0% -83 dBm |
| Union, IL | 100.0% 100.0% 100.0% 100.0% -95 dBm | 100.0% 100.0% 100.0% 100.0% -94 dBm | 100.0% 100.0% 100.0% 100.0% -71 dBm |
| Wonder Lake, IL | 100.0% 100.0% 89.3% 51.6% -98 dBm | 100.0% 100.0% 100.0% 91.8% -106 dBm | 100.0% 100.0% 100.0% 89.3% -84 dBm |
| Woodstock, IL | 100.0% 100.0% 99.7% 77.9% -91 dBm | 100.0% 100.0% 99.4% 85.4% -102 dBm | 100.0% 100.0% 100.0% 100.0% -79 dBm |
| Barrington Hills, IL | 100.0% 100.0% 91.7% 56.9% -98 dBm | 100.0% 100.0% 91.4% 60.8% -108 dBm | 96.8% 96.8% 88.1% 56.5% -93 dBm |
| Fox Lake, IL | 100.0% 100.0% 100.0% 89.7% -91 dBm | 100.0% 100.0% 99.0% 88.1% -101 dBm | 100.0% 100.0% 100.0% 100.0% -75 dBm |
| Garden Prairie, IL | 100.0% 100.0% 66.7% 46.7% -97 dBm | 100.0% 100.0% 80.0% 66.7% -115 dBm | 100.0% 100.0% 100.0% 86.7% -88 dBm |
| Gilberts, IL | 100.0% 100.0% 100.0% 99.3% -90 dBm | 100.0% 100.0% 100.0% 56.0% -104 dBm | 100.0% 100.0% 100.0% 100.0% -75 dBm |
| Hampshire, IL | 100.0% 100.0% 99.6% 96.7% -86 dBm | 100.0% 100.0% 99.6% 88.6% -110 dBm | 100.0% 100.0% 100.0% 91.4% -83 dBm |
| Lake Barrington, IL | 100.0% 100.0% 99.3% 75.7% -95 dBm | 100.0% 100.0% 96.5% 66.0% -110 dBm | 100.0% 100.0% 100.0% 87.5% -90 dBm |
| Port Barrington, IL | 100.0% 100.0% 100.0% 100.0% -95 dBm | 100.0% 100.0% 100.0% 83.3% -108 dBm | 100.0% 100.0% 100.0% 100.0% -83 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 McHenry 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.