Clay County, IA Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Clay County, IA

Coverage rankings for Clay County, IA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 97.1. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile97.199.2%99.2%97.7%91.2% -86 dBm
2Verizon74.298.4%98.4%50.1%27.5% -95 dBm
3AT&T68.997.1%96.7%46.6%29.1% -111 dBm

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

Cell phone coverage map for Clay County, IA

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 Clay County, IA

#1

T-Mobile

Coverage Score 97.1
In Clay County, IA
Overall
99.2%
4G LTE
99.2%
5G
97.7%
Fast 5G
91.2%
Average Signal -86 dBm
#2

Verizon

Coverage Score 74.2
In Clay County, IA
Overall
98.4%
4G LTE
98.4%
5G
50.1%
Fast 5G
27.5%
Average Signal -95 dBm
#3

AT&T

Coverage Score 68.9
In Clay County, IA
Overall
97.1%
4G LTE
96.7%
5G
46.6%
Fast 5G
29.1%
Average Signal -111 dBm
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Coverage by city in Clay County, IA

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

CityVerizonAT&TT-Mobile
Dickens, IA 100.0% 100.0% 76.2% 23.8% -95 dBm 100.0% 100.0% 42.9% 38.1% -93 dBm 100.0% 100.0% 100.0% 100.0% -60 dBm
Everly, IA 100.0% 100.0% 96.4% 92.9% -83 dBm 100.0% 100.0% 60.7% 60.7% -103 dBm 100.0% 100.0% 100.0% 100.0% -64 dBm
Fostoria, IA 100.0% 100.0% 100.0% 50.0% -90 dBm 100.0% 100.0% 60.0% 10.0% -110 dBm 100.0% 100.0% 100.0% 90.0% -91 dBm
Gillett Grove, IA 60.0% 60.0% 0.0% 0.0% -100 dBm 100.0% 100.0% 0.0% 0.0% -120 dBm 100.0% 100.0% 80.0% 60.0% -98 dBm
Greenville, IA 100.0% 100.0% 0.0% 0.0% -102 dBm 100.0% 100.0% 80.0% 0.0% -120 dBm 100.0% 100.0% 100.0% 100.0% -68 dBm
Peterson, IA 42.9% 42.9% 14.3% 0.0% -112 dBm 100.0% 100.0% 21.4% 21.4% -89 dBm 100.0% 100.0% 100.0% 100.0% -69 dBm
Rossie, IA 100.0% 100.0% 0.0% 0.0% -100 dBm 100.0% 100.0% 100.0% 0.0% -120 dBm 100.0% 100.0% 100.0% 100.0% -80 dBm
Royal, IA 100.0% 100.0% 71.4% 0.0% -100 dBm 100.0% 100.0% 14.3% 0.0% -113 dBm 100.0% 100.0% 85.7% 71.4% -91 dBm
Spencer, IA 100.0% 100.0% 84.6% 59.9% -87 dBm 100.0% 100.0% 91.9% 81.6% -109 dBm 100.0% 100.0% 100.0% 100.0% -72 dBm
Webb, IA 100.0% 100.0% 0.0% 0.0% -95 dBm 100.0% 100.0% 16.7% 0.0% -120 dBm 100.0% 100.0% 100.0% 100.0% -61 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 Clay County, IA 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.