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

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

Coverage rankings for Winneshiek County, IA

Verizon currently ranks first for coverage in this area, with a coverage score of 54.5. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1Verizon54.592.9%92.9%4.5%1.9% -97 dBm
2T-Mobile48.754.2%54.2%37.3%19.5% -98 dBm
3AT&T17.125.2%25.2%0.0%0.0% -117 dBm

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

Cell phone coverage map for Winneshiek 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 Winneshiek County, IA

#1

Verizon

Coverage Score 54.5
In Winneshiek County, IA
Overall
92.9%
4G LTE
92.9%
5G
4.5%
Fast 5G
1.9%
Average Signal -97 dBm
#2

T-Mobile

Coverage Score 48.7
In Winneshiek County, IA
Overall
54.2%
4G LTE
54.2%
5G
37.3%
Fast 5G
19.5%
Average Signal -98 dBm
#3

AT&T

Coverage Score 17.1
In Winneshiek County, IA
Overall
25.2%
4G LTE
25.2%
5G
0.0%
Fast 5G
0.0%
Average Signal -117 dBm
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Coverage by city in Winneshiek County, IA

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

CityVerizonAT&TT-Mobile
Burr Oak, IA 100.0% 100.0% 0.0% 0.0% -65 dBm 88.2% 88.2% 0.0% 0.0% -118 dBm 100.0% 100.0% 76.5% 0.0% -101 dBm
Calmar, IA 100.0% 100.0% 0.0% 0.0% -70 dBm 18.5% 18.5% 0.0% 0.0% -120 dBm 100.0% 100.0% 100.0% 100.0% -68 dBm
Castalia, IA 100.0% 100.0% 0.0% 0.0% -101 dBm N/A N/A N/A N/A N/A 76.9% 76.9% 30.8% 15.4% -104 dBm
Decorah, IA 100.0% 100.0% 0.0% 0.0% -78 dBm 1.2% 1.2% 0.0% 0.0% -120 dBm 4.1% 4.1% 1.8% 0.0% -106 dBm
Fort Atkinson, IA 100.0% 100.0% 0.0% 0.0% -98 dBm N/A N/A N/A N/A N/A 75.0% 75.0% 50.0% 12.5% -100 dBm
Jackson Junction, IA 100.0% 100.0% 25.2% 0.0% -103 dBm 51.7% 51.7% 0.0% 0.0% -120 dBm 82.5% 82.5% 39.9% 16.1% -101 dBm
Ossian, IA 100.0% 100.0% 0.0% 0.0% -98 dBm 7.4% 7.4% 0.0% 0.0% -120 dBm 96.3% 96.3% 81.5% 22.2% -99 dBm
Ridgeway, IA 100.0% 100.0% 0.0% 0.0% -75 dBm 44.4% 44.4% 0.0% 0.0% -120 dBm 94.4% 94.4% 61.1% 16.7% -102 dBm
Spillville, IA 36.4% 36.4% 0.0% 0.0% -110 dBm N/A N/A N/A N/A N/A 9.1% 9.1% 0.0% 0.0% -110 dBm
Protivin, IA 100.0% 100.0% 0.0% 0.0% -107 dBm 36.4% 36.4% 0.0% 0.0% -120 dBm 36.4% 36.4% 9.1% 0.0% -108 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 Winneshiek 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.