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

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

Coverage rankings for Sioux County, IA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 91.5. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile91.597.1%97.1%90.4%71.6% -90 dBm
2Verizon80.798.9%98.9%61.2%41.0% -93 dBm
3AT&T75.998.8%98.0%67.0%39.0% -111 dBm

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

Cell phone coverage map for Sioux 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 Sioux County, IA

#1

T-Mobile

Coverage Score 91.5
In Sioux County, IA
Overall
97.1%
4G LTE
97.1%
5G
90.4%
Fast 5G
71.6%
Average Signal -90 dBm
#2

Verizon

Coverage Score 80.7
In Sioux County, IA
Overall
98.9%
4G LTE
98.9%
5G
61.2%
Fast 5G
41.0%
Average Signal -93 dBm
#3

AT&T

Coverage Score 75.9
In Sioux County, IA
Overall
98.8%
4G LTE
98.0%
5G
67.0%
Fast 5G
39.0%
Average Signal -111 dBm
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Coverage by city in Sioux County, IA

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

CityVerizonAT&TT-Mobile
Alton, IA 100.0% 100.0% 61.7% 51.1% -90 dBm 100.0% 100.0% 55.3% 44.7% -103 dBm 100.0% 100.0% 100.0% 100.0% -78 dBm
Boyden, IA 100.0% 100.0% 100.0% 100.0% -69 dBm 100.0% 100.0% 5.9% 5.9% -84 dBm 100.0% 100.0% 100.0% 100.0% -65 dBm
Chatsworth, IA 100.0% 100.0% 0.0% 0.0% -88 dBm 100.0% 100.0% 0.0% 0.0% -108 dBm 100.0% 100.0% 100.0% 53.8% -95 dBm
Granville, IA 100.0% 100.0% 33.3% 16.7% -98 dBm 100.0% 100.0% 66.7% 33.3% -120 dBm 100.0% 100.0% 66.7% 50.0% -98 dBm
Hawarden, IA 100.0% 100.0% 60.0% 35.7% -88 dBm 100.0% 100.0% 52.9% 48.6% -103 dBm 100.0% 100.0% 100.0% 100.0% -71 dBm
Hospers, IA 100.0% 100.0% 100.0% 91.7% -82 dBm 100.0% 100.0% 100.0% 100.0% -98 dBm 100.0% 100.0% 100.0% 100.0% -78 dBm
Hull, IA 100.0% 100.0% 41.2% 0.0% -82 dBm 100.0% 100.0% 17.6% 17.6% -87 dBm 100.0% 100.0% 100.0% 100.0% -66 dBm
Ireton, IA 100.0% 100.0% 29.2% 0.0% -90 dBm 100.0% 100.0% 37.5% 37.5% -96 dBm 100.0% 100.0% 100.0% 100.0% -85 dBm
Matlock, IA 100.0% 100.0% 100.0% 90.0% -94 dBm 100.0% 100.0% 30.0% 30.0% -96 dBm 100.0% 100.0% 100.0% 80.0% -92 dBm
Maurice, IA 100.0% 100.0% 6.3% 0.0% -93 dBm 100.0% 100.0% 100.0% 75.0% -87 dBm 100.0% 100.0% 56.3% 43.8% -84 dBm
Orange City, IA 100.0% 100.0% 100.0% 100.0% -77 dBm 100.0% 100.0% 85.8% 66.7% -114 dBm 100.0% 100.0% 99.2% 95.0% -84 dBm
Rock Valley, IA 100.0% 100.0% 88.9% 80.6% -82 dBm 100.0% 100.0% 48.1% 32.4% -104 dBm 100.0% 100.0% 100.0% 100.0% -72 dBm
Sioux Center, IA 100.0% 100.0% 97.0% 89.9% -82 dBm 100.0% 100.0% 100.0% 86.9% -94 dBm 100.0% 100.0% 100.0% 98.2% -81 dBm
Sheldon, IA 100.0% 100.0% 100.0% 99.2% -78 dBm 100.0% 100.0% 100.0% 71.7% -93 dBm 100.0% 100.0% 100.0% 100.0% -75 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 Sioux 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.