Williamson County, TN Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Williamson County, TN

Coverage rankings for Williamson County, TN

T-Mobile currently ranks first for coverage in this area, with a coverage score of 84.6. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile84.688.5%88.4%80.2%63.0% -90 dBm
2AT&T79.594.8%94.7%78.4%51.0% -110 dBm
3Verizon72.192.7%92.7%47.9%31.0% -95 dBm

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

Cell phone coverage map for Williamson County, TN

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 Williamson County, TN

#1

T-Mobile

Coverage Score 84.6
In Williamson County, TN
Overall
88.5%
4G LTE
88.4%
5G
80.2%
Fast 5G
63.0%
Average Signal -90 dBm
#2

AT&T

Coverage Score 79.5
In Williamson County, TN
Overall
94.8%
4G LTE
94.7%
5G
78.4%
Fast 5G
51.0%
Average Signal -110 dBm
#3

Verizon

Coverage Score 72.1
In Williamson County, TN
Overall
92.7%
4G LTE
92.7%
5G
47.9%
Fast 5G
31.0%
Average Signal -95 dBm
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Coverage by city in Williamson County, TN

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

CityVerizonAT&TT-Mobile
Arrington, TN 98.9% 98.9% 55.0% 38.6% -95 dBm 97.9% 97.7% 78.1% 57.5% -114 dBm 99.1% 99.1% 95.9% 80.2% -88 dBm
Brentwood, TN 100.0% 100.0% 72.4% 48.3% -91 dBm 99.6% 99.4% 97.7% 60.8% -106 dBm 99.8% 99.8% 99.1% 89.6% -88 dBm
College Grove, TN 93.4% 93.4% 42.0% 24.8% -97 dBm 97.8% 97.7% 78.4% 51.9% -113 dBm 77.1% 77.1% 67.8% 52.1% -91 dBm
Fairview, TN 98.0% 98.0% 37.3% 22.3% -98 dBm 99.6% 99.6% 94.9% 67.8% -108 dBm 98.0% 98.0% 89.2% 69.3% -90 dBm
Franklin, TN 100.0% 100.0% 92.2% 78.8% -85 dBm 99.9% 99.9% 98.5% 68.7% -102 dBm 99.9% 99.9% 99.5% 93.2% -84 dBm
Nolensville, TN 100.0% 100.0% 66.9% 37.9% -92 dBm 100.0% 100.0% 99.3% 74.3% -103 dBm 100.0% 100.0% 99.3% 95.6% -86 dBm
Primm Springs, TN 74.4% 74.1% 5.2% 3.1% -100 dBm 87.9% 87.9% 59.4% 44.3% -116 dBm 58.9% 58.9% 41.1% 25.6% -97 dBm
Thompson’s Station, TN 99.8% 99.8% 70.0% 47.3% -93 dBm 99.7% 99.7% 94.9% 64.4% -109 dBm 100.0% 100.0% 100.0% 96.9% -84 dBm
Thompsons Station, TN 99.0% 99.0% 48.0% 30.7% -96 dBm 98.1% 97.9% 83.7% 52.3% -111 dBm 95.2% 95.2% 88.7% 69.2% -90 dBm
Eagleville, TN 100.0% 100.0% 68.0% 50.7% -90 dBm 100.0% 100.0% 86.7% 77.3% -109 dBm 100.0% 100.0% 100.0% 96.0% -85 dBm
La Vergne, TN 100.0% 100.0% 82.3% 64.6% -89 dBm 100.0% 99.6% 96.6% 65.8% -105 dBm 99.8% 99.8% 99.1% 92.4% -82 dBm
Nashville, TN 99.2% 99.2% 70.2% 52.9% -91 dBm 95.9% 95.8% 84.7% 56.6% -105 dBm 94.3% 94.3% 88.9% 77.3% -85 dBm
Smyrna, TN 100.0% 100.0% 75.5% 57.5% -90 dBm 99.4% 99.4% 95.7% 59.6% -104 dBm 100.0% 100.0% 99.9% 95.1% -82 dBm
Spring Hill, TN 100.0% 100.0% 76.8% 59.2% -90 dBm 99.9% 99.7% 98.5% 58.0% -106 dBm 100.0% 100.0% 100.0% 94.3% -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 Williamson County, TN 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.