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

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

Coverage rankings for Jefferson County, IA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 80.7. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile80.782.0%82.0%75.3%60.3% -90 dBm
2Verizon62.492.7%92.7%30.1%13.8% -100 dBm
3AT&T46.484.9%84.9%2.4%1.0% -110 dBm

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

Cell phone coverage map for Jefferson 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 Jefferson County, IA

#1

T-Mobile

Coverage Score 80.7
In Jefferson County, IA
Overall
82.0%
4G LTE
82.0%
5G
75.3%
Fast 5G
60.3%
Average Signal -90 dBm
#2

Verizon

Coverage Score 62.4
In Jefferson County, IA
Overall
92.7%
4G LTE
92.7%
5G
30.1%
Fast 5G
13.8%
Average Signal -100 dBm
#3

AT&T

Coverage Score 46.4
In Jefferson County, IA
Overall
84.9%
4G LTE
84.9%
5G
2.4%
Fast 5G
1.0%
Average Signal -110 dBm
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Coverage by city in Jefferson County, IA

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

CityVerizonAT&TT-Mobile
Batavia, IA 100.0% 100.0% 0.0% 0.0% -91 dBm 100.0% 100.0% 29.4% 17.6% -101 dBm 100.0% 100.0% 100.0% 100.0% -69 dBm
Fairfield, IA 100.0% 100.0% 57.7% 43.6% -83 dBm 100.0% 100.0% 0.0% 0.0% -93 dBm 100.0% 100.0% 100.0% 100.0% -76 dBm
Libertyville, IA 100.0% 100.0% 61.5% 0.0% -100 dBm 100.0% 100.0% 0.0% 0.0% -111 dBm 92.3% 92.3% 92.3% 76.9% -93 dBm
Lockridge, IA 73.3% 73.3% 20.0% 0.0% -105 dBm 100.0% 100.0% 0.0% 0.0% -97 dBm 100.0% 100.0% 100.0% 100.0% -77 dBm
Maharishi Vedic City, IA 97.6% 97.6% 35.4% 17.1% -102 dBm 97.6% 97.6% 0.0% 0.0% -114 dBm 100.0% 100.0% 100.0% 75.6% -90 dBm
Packwood, IA 100.0% 100.0% 63.2% 0.0% -102 dBm 100.0% 100.0% 0.0% 0.0% -118 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
Pleasant Plain, IA 100.0% 100.0% 88.0% 80.0% -92 dBm 100.0% 100.0% 0.0% 0.0% -102 dBm 100.0% 100.0% 92.0% 88.0% -90 dBm
Coppock, IA 85.7% 85.7% 14.3% 0.0% -102 dBm 85.7% 85.7% 0.0% 0.0% -118 dBm 42.9% 42.9% 0.0% 0.0% -107 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 Jefferson 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.