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

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

Coverage rankings for Clark County, SD

T-Mobile currently ranks first for coverage in this area, with a coverage score of 87.8. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile87.896.0%96.0%87.4%61.0% -93 dBm
2AT&T78.299.3%99.3%62.7%47.3% -110 dBm
3Verizon75.096.5%96.5%55.2%30.8% -95 dBm

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

Cell phone coverage map for Clark 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.

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Cell phone coverage by network in Clark County, SD

#1

T-Mobile

Coverage Score 87.8
In Clark County, SD
Overall
96.0%
4G LTE
96.0%
5G
87.4%
Fast 5G
61.0%
Average Signal -93 dBm
#2

AT&T

Coverage Score 78.2
In Clark County, SD
Overall
99.3%
4G LTE
99.3%
5G
62.7%
Fast 5G
47.3%
Average Signal -110 dBm
#3

Verizon

Coverage Score 75.0
In Clark County, SD
Overall
96.5%
4G LTE
96.5%
5G
55.2%
Fast 5G
30.8%
Average Signal -95 dBm
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Coverage by city in Clark County, SD

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

CityVerizonAT&TT-Mobile
Bradley, SD 100.0% 100.0% 50.0% 0.0% -103 dBm 100.0% 100.0% 100.0% 100.0% -115 dBm 100.0% 100.0% 50.0% 25.0% -100 dBm
Clark, SD 100.0% 100.0% 80.6% 38.9% -91 dBm 100.0% 100.0% 69.4% 69.4% -111 dBm 100.0% 100.0% 80.6% 36.1% -98 dBm
Collins Colony, SD 100.0% 100.0% 14.3% 0.0% -103 dBm 100.0% 100.0% 71.4% 71.4% -119 dBm 100.0% 100.0% 100.0% 57.1% -94 dBm
Crocker, SD 72.0% 72.0% 0.0% 0.0% -106 dBm 94.6% 94.6% 68.8% 68.8% -118 dBm 65.6% 65.6% 28.0% 5.4% -105 dBm
Fordham Colony, SD 100.0% 100.0% 90.0% 0.0% -100 dBm 100.0% 100.0% 0.0% 0.0% -115 dBm 100.0% 100.0% 100.0% 70.0% -95 dBm
Garden City, SD 100.0% 100.0% 100.0% 100.0% -74 dBm 100.0% 100.0% 100.0% 90.0% -104 dBm 80.0% 80.0% 50.0% 10.0% -104 dBm
Hillcrest Colony, SD 100.0% 100.0% 100.0% 95.7% -90 dBm 100.0% 100.0% 100.0% 73.9% -113 dBm 91.3% 91.3% 87.0% 17.4% -99 dBm
Mayfield Colony, SD 100.0% 100.0% 57.1% 28.6% -94 dBm 100.0% 100.0% 100.0% 85.7% -113 dBm 100.0% 100.0% 100.0% 85.7% -94 dBm
Naples, SD 100.0% 100.0% 0.0% 0.0% -93 dBm 100.0% 100.0% 100.0% 50.0% -113 dBm 100.0% 100.0% 75.0% 0.0% -100 dBm
Raymond, SD 100.0% 100.0% 57.1% 0.0% -103 dBm 100.0% 100.0% 0.0% 0.0% -106 dBm 100.0% 100.0% 71.4% 14.3% -103 dBm
Silver Lake Colony, SD 100.0% 100.0% 16.7% 0.0% -95 dBm 100.0% 100.0% 100.0% 83.3% -117 dBm 100.0% 100.0% 100.0% 100.0% -92 dBm
Vienna, SD 100.0% 100.0% 81.0% 0.0% -100 dBm 100.0% 100.0% 85.7% 14.3% -120 dBm 100.0% 100.0% 95.2% 47.6% -96 dBm
Willow Lake, SD 100.0% 100.0% 0.0% 0.0% -60 dBm 100.0% 100.0% 100.0% 100.0% -109 dBm 100.0% 100.0% 87.5% 25.0% -100 dBm
Clark Colony, SD 100.0% 100.0% 71.4% 0.0% -100 dBm 100.0% 100.0% 0.0% 0.0% -111 dBm 100.0% 100.0% 100.0% 42.9% -96 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 Clark 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.