Gregory County, SD Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Gregory County, SD

Coverage rankings for Gregory County, SD

T-Mobile currently ranks first for coverage in this area, with a coverage score of 60.4. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile60.466.2%66.2%52.2%29.7% -96 dBm
2Verizon58.793.2%93.1%11.6%7.4% -93 dBm
3AT&T50.479.5%79.5%15.7%14.0% -112 dBm

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

Cell phone coverage map for Gregory County, SD

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.

Loading coverage map...

Cell phone coverage by network in Gregory County, SD

#1

T-Mobile

Coverage Score 60.4
In Gregory County, SD
Overall
66.2%
4G LTE
66.2%
5G
52.2%
Fast 5G
29.7%
Average Signal -96 dBm
#2

Verizon

Coverage Score 58.7
In Gregory County, SD
Overall
93.2%
4G LTE
93.1%
5G
11.6%
Fast 5G
7.4%
Average Signal -93 dBm
#3

AT&T

Coverage Score 50.4
In Gregory County, SD
Overall
79.5%
4G LTE
79.5%
5G
15.7%
Fast 5G
14.0%
Average Signal -112 dBm
Sponsored US Mobile

Coverage varies by neighborhood. Your carrier shouldn’t.

US Mobile lets you switch between all three major networks, so you can choose the one that works best where you actually use your phone.

Choose your network
Dark Star Light Speed Warp 5G
Unlimited plans from
$22.50/mo
Phone + home internet bundle from
$47/mo
Shop US Mobile

Pricing, network access, switching terms, and home internet availability may vary.

Coverage by city in Gregory County, SD

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

CityVerizonAT&TT-Mobile
Bonesteel, SD 100.0% 100.0% 55.6% 33.3% -91 dBm 100.0% 100.0% 0.0% 0.0% -99 dBm 100.0% 100.0% 100.0% 66.7% -93 dBm
Burke, SD 100.0% 100.0% 0.0% 0.0% -69 dBm 100.0% 100.0% 21.4% 21.4% -104 dBm 100.0% 100.0% 100.0% 92.9% -93 dBm
Dallas, SD 100.0% 100.0% 0.0% 0.0% -92 dBm 100.0% 100.0% 36.4% 36.4% -117 dBm 100.0% 100.0% 90.9% 54.5% -97 dBm
Fairfax, SD 100.0% 100.0% 14.3% 0.0% -77 dBm 100.0% 100.0% 0.0% 0.0% -91 dBm 100.0% 100.0% 100.0% 100.0% -70 dBm
Gregory, SD 100.0% 100.0% 0.0% 0.0% -71 dBm 100.0% 100.0% 0.0% 0.0% -98 dBm 95.2% 95.2% 66.7% 40.5% -99 dBm
Herrick, SD 100.0% 100.0% 92.3% 84.6% -94 dBm 100.0% 100.0% 0.0% 0.0% -111 dBm 61.5% 61.5% 15.4% 0.0% -108 dBm
Saint Charles, SD 100.0% 100.0% 100.0% 75.0% -78 dBm 100.0% 100.0% 0.0% 0.0% -110 dBm 75.0% 75.0% 25.0% 0.0% -103 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 Gregory County, SD 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.