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

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

Coverage rankings for Polk County, IA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 98.3. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile98.399.9%99.9%98.6%93.7% -82 dBm
2Verizon94.3100.0%100.0%89.8%78.5% -88 dBm
3AT&T79.599.5%99.3%73.3%41.0% -105 dBm

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

Cell phone coverage map for Polk 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 Polk County, IA

#1

T-Mobile

Coverage Score 98.3
In Polk County, IA
Overall
99.9%
4G LTE
99.9%
5G
98.6%
Fast 5G
93.7%
Average Signal -82 dBm
#2

Verizon

Coverage Score 94.3
In Polk County, IA
Overall
100.0%
4G LTE
100.0%
5G
89.8%
Fast 5G
78.5%
Average Signal -88 dBm
#3

AT&T

Coverage Score 79.5
In Polk County, IA
Overall
99.5%
4G LTE
99.3%
5G
73.3%
Fast 5G
41.0%
Average Signal -105 dBm
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Coverage by city in Polk County, IA

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

CityVerizonAT&TT-Mobile
Alleman, IA 100.0% 100.0% 100.0% 100.0% -78 dBm 100.0% 100.0% 80.6% 75.0% -109 dBm 100.0% 100.0% 100.0% 100.0% -82 dBm
Altoona, IA 100.0% 100.0% 100.0% 98.8% -81 dBm 100.0% 100.0% 98.5% 44.0% -98 dBm 100.0% 100.0% 100.0% 99.1% -80 dBm
Ankeny, IA 100.0% 100.0% 99.8% 97.8% -80 dBm 99.1% 98.4% 94.4% 47.9% -105 dBm 100.0% 100.0% 100.0% 99.4% -77 dBm
Berwick, IA 100.0% 100.0% 100.0% 88.9% -89 dBm 100.0% 100.0% 100.0% 77.8% -108 dBm 100.0% 100.0% 100.0% 88.9% -91 dBm
Bondurant, IA 100.0% 100.0% 96.0% 87.3% -87 dBm 100.0% 100.0% 97.8% 69.6% -101 dBm 100.0% 100.0% 100.0% 100.0% -78 dBm
Carlisle, IA 100.0% 100.0% 97.2% 91.6% -81 dBm 100.0% 100.0% 65.7% 54.5% -105 dBm 100.0% 100.0% 100.0% 100.0% -73 dBm
Clive, IA 100.0% 100.0% 100.0% 88.9% -91 dBm 100.0% 100.0% 98.9% 53.7% -103 dBm 100.0% 100.0% 100.0% 98.4% -81 dBm
Des Moines, IA 100.0% 100.0% 98.3% 91.8% -86 dBm 99.8% 99.6% 94.7% 51.7% -101 dBm 100.0% 100.0% 100.0% 98.7% -77 dBm
Elkhart, IA 100.0% 100.0% 100.0% 100.0% -80 dBm 100.0% 100.0% 97.8% 71.7% -106 dBm 100.0% 100.0% 97.8% 82.6% -89 dBm
Grimes, IA 100.0% 100.0% 100.0% 99.4% -79 dBm 100.0% 100.0% 97.7% 60.3% -100 dBm 100.0% 100.0% 100.0% 100.0% -74 dBm
Johnston, IA 100.0% 100.0% 99.2% 94.3% -87 dBm 98.0% 96.9% 88.2% 49.4% -104 dBm 99.8% 99.8% 98.2% 91.6% -84 dBm
Mitchellville, IA 100.0% 100.0% 66.7% 19.4% -91 dBm 100.0% 100.0% 75.0% 73.6% -109 dBm 100.0% 100.0% 100.0% 100.0% -71 dBm
Pleasant Hill, IA 100.0% 100.0% 99.6% 93.8% -82 dBm 100.0% 100.0% 93.4% 42.2% -101 dBm 100.0% 100.0% 100.0% 98.4% -77 dBm
Polk City, IA 100.0% 100.0% 96.2% 66.9% -98 dBm 100.0% 100.0% 35.3% 24.8% -102 dBm 100.0% 100.0% 100.0% 100.0% -73 dBm
Runnells, IA 100.0% 100.0% 56.3% 31.3% -86 dBm 100.0% 100.0% 18.8% 18.8% -113 dBm 100.0% 100.0% 87.5% 43.8% -94 dBm
Saylorville, IA 100.0% 100.0% 100.0% 92.3% -82 dBm 97.6% 96.4% 89.3% 39.9% -102 dBm 100.0% 100.0% 100.0% 98.8% -79 dBm
Sheldahl, IA 100.0% 100.0% 100.0% 95.0% -97 dBm 100.0% 100.0% 35.0% 10.0% -110 dBm 100.0% 100.0% 100.0% 90.0% -91 dBm
Urbandale, IA 100.0% 100.0% 99.6% 92.7% -84 dBm 99.8% 99.6% 96.8% 48.5% -102 dBm 100.0% 100.0% 100.0% 99.1% -77 dBm
West Des Moines, IA 100.0% 100.0% 96.9% 87.1% -88 dBm 98.9% 98.7% 91.6% 58.8% -104 dBm 100.0% 100.0% 99.1% 96.5% -79 dBm
Windsor Heights, IA 100.0% 100.0% 100.0% 97.3% -85 dBm 100.0% 100.0% 100.0% 67.6% -99 dBm 100.0% 100.0% 100.0% 94.6% -88 dBm
Granger, IA 100.0% 100.0% 95.6% 88.2% -92 dBm 100.0% 100.0% 76.5% 76.5% -113 dBm 100.0% 100.0% 100.0% 100.0% -74 dBm
Norwalk, IA 100.0% 100.0% 99.7% 93.0% -84 dBm 100.0% 100.0% 98.3% 53.3% -103 dBm 100.0% 100.0% 98.3% 93.4% -83 dBm
Waukee, IA 100.0% 100.0% 96.5% 93.8% -81 dBm 100.0% 100.0% 93.4% 72.7% -103 dBm 100.0% 100.0% 100.0% 98.5% -82 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 Polk 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.