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

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

Coverage rankings for Iowa County, IA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 86.4. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile86.491.7%91.7%81.6%63.5% -90 dBm
2Verizon57.893.7%93.7%13.3%5.7% -96 dBm
3AT&T54.986.6%86.5%25.0%13.0% -112 dBm

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

Cell phone coverage map for Iowa 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 Iowa County, IA

#1

T-Mobile

Coverage Score 86.4
In Iowa County, IA
Overall
91.7%
4G LTE
91.7%
5G
81.6%
Fast 5G
63.5%
Average Signal -90 dBm
#2

Verizon

Coverage Score 57.8
In Iowa County, IA
Overall
93.7%
4G LTE
93.7%
5G
13.3%
Fast 5G
5.7%
Average Signal -96 dBm
#3

AT&T

Coverage Score 54.9
In Iowa County, IA
Overall
86.6%
4G LTE
86.5%
5G
25.0%
Fast 5G
13.0%
Average Signal -112 dBm
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Coverage by city in Iowa County, IA

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

CityVerizonAT&TT-Mobile
Amana, IA 100.0% 100.0% 0.0% 0.0% -80 dBm 100.0% 100.0% 83.3% 33.3% -112 dBm 100.0% 100.0% 100.0% 91.7% -85 dBm
Conroy, IA 100.0% 100.0% 0.0% 0.0% -67 dBm 100.0% 100.0% 52.6% 0.0% -115 dBm 100.0% 100.0% 100.0% 100.0% -59 dBm
East Amana, IA 100.0% 100.0% 0.0% 0.0% -93 dBm 100.0% 100.0% 44.4% 22.2% -107 dBm 100.0% 100.0% 100.0% 55.6% -90 dBm
High Amana, IA 100.0% 100.0% 57.1% 0.0% -97 dBm 100.0% 100.0% 0.0% 0.0% -91 dBm 100.0% 100.0% 100.0% 85.7% -93 dBm
Homestead, IA 100.0% 100.0% 21.9% 6.3% -97 dBm 100.0% 100.0% 34.4% 34.4% -107 dBm 78.1% 78.1% 68.8% 37.5% -96 dBm
Ladora, IA 100.0% 100.0% 37.5% 0.0% -95 dBm 100.0% 100.0% 0.0% 0.0% -104 dBm 100.0% 100.0% 87.5% 50.0% -95 dBm
Marengo, IA 100.0% 100.0% 100.0% 100.0% -73 dBm 94.6% 94.6% 0.0% 0.0% -118 dBm 100.0% 100.0% 100.0% 100.0% -69 dBm
Middle Amana, IA 100.0% 100.0% 4.2% 0.0% -70 dBm 100.0% 100.0% 58.3% 54.2% -99 dBm 100.0% 100.0% 100.0% 58.3% -94 dBm
Millersburg, IA 100.0% 100.0% 0.0% 0.0% -107 dBm 100.0% 100.0% 33.3% 0.0% -120 dBm 100.0% 100.0% 100.0% 100.0% -63 dBm
North English, IA 100.0% 100.0% 0.0% 0.0% -67 dBm 66.7% 66.7% 0.0% 0.0% -120 dBm 80.0% 80.0% 40.0% 13.3% -102 dBm
Parnell, IA 100.0% 100.0% 0.0% 0.0% -93 dBm 100.0% 100.0% 33.3% 0.0% -113 dBm 100.0% 100.0% 100.0% 33.3% -97 dBm
South Amana, IA 100.0% 100.0% 5.6% 2.8% -90 dBm 100.0% 100.0% 11.1% 0.0% -103 dBm 100.0% 100.0% 97.2% 86.1% -90 dBm
Victor, IA 100.0% 100.0% 25.0% 16.7% -103 dBm 100.0% 100.0% 16.7% 16.7% -97 dBm 100.0% 100.0% 100.0% 100.0% -67 dBm
West Amana, IA 100.0% 100.0% 57.1% 14.3% -100 dBm 100.0% 100.0% 0.0% 0.0% -100 dBm 100.0% 100.0% 85.7% 57.1% -91 dBm
Williamsburg, IA 100.0% 100.0% 0.0% 0.0% -72 dBm 100.0% 100.0% 98.8% 96.3% -100 dBm 100.0% 100.0% 100.0% 100.0% -73 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 Iowa 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.