Carrierlytics County Coverage Guide

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.

Using FCC mobile coverage data across cities and ZIP codes in St. Clair County, AL, Carrierlytics compares the top-performing networks and the cheapest plans that use them.

St. Clair County, AL

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 Carrierlytics.

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Cell phone coverage rankings by network in St. Clair County, AL

#1

T-Mobile

Coverage Score 73.2
In St. Clair County, AL
Overall
73.3%
4G LTE
73.3% avg. -96 dBm 4G LTE signal where 4G LTE coverage exists: avg. -96 dBm
5G
67.3% avg. -90 dBm 5G signal where 5G coverage exists: avg. -90 dBm
Fast 5G
46.8% avg. -86 dBm Fast 5G signal where Fast 5G coverage exists: avg. -86 dBm
#2

Verizon

Coverage Score 69.9
In St. Clair County, AL
Overall
99.3%
4G LTE
99.3% avg. -94 dBm 4G LTE signal where 4G LTE coverage exists: avg. -94 dBm
5G
48.9% avg. -100 dBm 5G signal where 5G coverage exists: avg. -100 dBm
Fast 5G
25.7% avg. -95 dBm Fast 5G signal where Fast 5G coverage exists: avg. -95 dBm
#3

AT&T

Coverage Score 59.6
In St. Clair County, AL
Overall
89.6%
4G LTE
89.6% avg. -109 dBm 4G LTE signal where 4G LTE coverage exists: avg. -109 dBm
5G
56.7% avg. -113 dBm 5G signal where 5G coverage exists: avg. -113 dBm
Fast 5G
34.0% avg. -110 dBm Fast 5G signal where Fast 5G coverage exists: avg. -110 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.

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

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 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.