St. Clair County, AL Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in St. Clair County, AL

Coverage rankings for St. Clair County, AL

Verizon currently ranks first for coverage in this area, with a coverage score of 72.8. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1Verizon72.899.3%99.3%48.9%25.7% -99 dBm
2T-Mobile72.173.3%73.3%67.3%46.8% -92 dBm
3AT&T68.189.6%89.6%56.7%34.0% -113 dBm

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

Cell phone coverage map for St. Clair County, AL

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 St. Clair County, AL

#1

Verizon

Coverage Score 72.8
In St. Clair County, AL
Overall
99.3%
4G LTE
99.3%
5G
48.9%
Fast 5G
25.7%
Average Signal -99 dBm
#2

T-Mobile

Coverage Score 72.1
In St. Clair County, AL
Overall
73.3%
4G LTE
73.3%
5G
67.3%
Fast 5G
46.8%
Average Signal -92 dBm
#3

AT&T

Coverage Score 68.1
In St. Clair County, AL
Overall
89.6%
4G LTE
89.6%
5G
56.7%
Fast 5G
34.0%
Average Signal -113 dBm
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Coverage by city in St. Clair County, AL

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

CityVerizonAT&TT-Mobile
Argo, AL 100.0% 100.0% 83.8% 56.0% -100 dBm 91.0% 91.0% 78.7% 61.4% -110 dBm 76.9% 76.9% 71.1% 48.4% -93 dBm
Ashville, AL 100.0% 100.0% 45.5% 23.8% -93 dBm 99.0% 99.0% 49.3% 34.8% -112 dBm 99.6% 99.6% 99.4% 86.5% -87 dBm
Cook Springs, AL 100.0% 100.0% 90.0% 60.0% -101 dBm 100.0% 100.0% 90.0% 90.0% -117 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
Cropwell, AL 100.0% 100.0% 62.5% 28.8% -102 dBm 98.2% 98.2% 87.6% 63.1% -109 dBm 85.4% 85.4% 79.4% 58.3% -90 dBm
Margaret, AL 100.0% 100.0% 79.9% 45.3% -102 dBm 93.7% 93.7% 79.1% 40.6% -114 dBm 51.6% 51.6% 31.9% 10.2% -102 dBm
Moody, AL 100.0% 100.0% 84.1% 55.8% -101 dBm 99.2% 99.2% 92.4% 61.5% -109 dBm 92.2% 92.2% 84.1% 65.9% -90 dBm
Odenville, AL 99.7% 99.7% 83.7% 45.5% -101 dBm 91.0% 91.0% 55.9% 33.7% -112 dBm 98.6% 98.6% 96.3% 82.9% -86 dBm
Pell City, AL 100.0% 100.0% 78.5% 49.4% -96 dBm 100.0% 100.0% 92.3% 62.2% -110 dBm 99.7% 99.7% 97.4% 76.9% -88 dBm
Ragland, AL 99.3% 99.3% 29.0% 17.1% -97 dBm 89.8% 89.8% 14.7% 7.8% -111 dBm 59.1% 59.1% 55.8% 39.4% -90 dBm
Riverside, AL 100.0% 100.0% 51.4% 25.0% -99 dBm 87.5% 87.5% 27.3% 9.3% -115 dBm 75.9% 75.9% 69.9% 51.4% -92 dBm
Springville, AL 100.0% 100.0% 82.1% 45.5% -97 dBm 95.5% 95.5% 87.8% 64.2% -111 dBm 99.2% 99.2% 98.0% 85.0% -87 dBm
Steele, AL 100.0% 100.0% 8.7% 1.2% -100 dBm 98.8% 98.8% 75.7% 34.1% -115 dBm 100.0% 100.0% 100.0% 87.9% -85 dBm
Clay, AL 100.0% 100.0% 76.3% 61.6% -98 dBm 93.2% 93.2% 86.4% 57.3% -109 dBm 90.3% 90.3% 87.5% 72.4% -89 dBm
Dunnavant, AL 99.4% 99.4% 59.2% 24.6% -104 dBm 94.4% 94.2% 82.9% 59.0% -110 dBm 84.2% 84.2% 78.8% 59.0% -91 dBm
Gallant, AL 86.0% 86.0% 14.6% 5.2% -103 dBm 72.7% 72.7% 40.8% 21.5% -117 dBm 3.9% 3.9% 3.6% 0.6% -99 dBm
Leeds, AL 99.8% 99.8% 89.4% 57.8% -99 dBm 99.1% 99.1% 97.0% 58.4% -106 dBm 97.2% 97.2% 95.1% 81.1% -88 dBm
Rainbow City, AL 100.0% 100.0% 55.1% 26.4% -94 dBm 99.7% 99.7% 88.7% 58.9% -113 dBm 92.2% 92.2% 84.3% 53.1% -93 dBm
Remlap, AL 99.8% 99.8% 9.8% 1.7% -91 dBm 99.5% 99.5% 90.2% 40.0% -111 dBm 88.5% 88.5% 82.8% 68.6% -90 dBm
Sterrett, AL 100.0% 100.0% 28.7% 8.8% -105 dBm 81.3% 81.3% 29.5% 11.2% -117 dBm 52.3% 52.3% 34.0% 12.8% -101 dBm
Trussville, AL 100.0% 100.0% 89.7% 62.2% -99 dBm 99.4% 99.4% 95.6% 60.5% -108 dBm 89.1% 89.1% 80.4% 59.6% -91 dBm
Vandiver, AL 100.0% 100.0% 83.5% 43.1% -101 dBm 91.9% 91.9% 26.6% 12.2% -110 dBm 82.9% 82.9% 78.7% 58.9% -91 dBm
Vincent, AL 100.0% 100.0% 79.0% 31.7% -102 dBm 99.6% 99.6% 96.0% 53.8% -112 dBm 98.8% 98.8% 92.9% 79.0% -87 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 St. Clair County, AL 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.