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

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

Coverage rankings for Jefferson County, CO

T-Mobile currently ranks first for coverage in this area, with a coverage score of 75.7. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile75.776.4%75.6%67.8%53.8% -89 dBm
2Verizon65.677.0%76.9%46.8%33.4% -95 dBm
3AT&T64.579.9%79.8%53.7%36.5% -112 dBm

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

Cell phone coverage map for Jefferson County, CO

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, CO

#1

T-Mobile

Coverage Score 75.7
In Jefferson County, CO
Overall
76.4%
4G LTE
75.6%
5G
67.8%
Fast 5G
53.8%
Average Signal -89 dBm
#2

Verizon

Coverage Score 65.6
In Jefferson County, CO
Overall
77.0%
4G LTE
76.9%
5G
46.8%
Fast 5G
33.4%
Average Signal -95 dBm
#3

AT&T

Coverage Score 64.5
In Jefferson County, CO
Overall
79.9%
4G LTE
79.8%
5G
53.7%
Fast 5G
36.5%
Average Signal -112 dBm
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Coverage by city in Jefferson County, CO

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

CityVerizonAT&TT-Mobile
Applewood, CO 100.0% 100.0% 95.7% 79.8% -90 dBm 100.0% 100.0% 98.9% 72.3% -102 dBm 100.0% 100.0% 100.0% 89.4% -86 dBm
Arvada, CO 99.4% 99.4% 92.8% 74.8% -89 dBm 98.3% 98.3% 87.3% 62.2% -109 dBm 99.3% 99.3% 98.9% 91.4% -84 dBm
Aspen Park, CO 100.0% 100.0% 56.4% 41.8% -94 dBm 89.1% 89.1% 50.9% 45.5% -114 dBm 100.0% 100.0% 96.4% 92.7% -83 dBm
Brook Forest, CO 100.0% 100.0% 29.4% 14.7% -104 dBm 58.8% 58.8% 17.6% 2.9% -120 dBm 67.6% 67.6% 58.8% 26.5% -98 dBm
Buffalo Creek, CO 27.4% 27.2% 8.5% 1.2% -105 dBm 59.9% 59.9% 32.1% 29.5% -117 dBm 53.3% 51.5% 42.2% 29.1% -94 dBm
Coal Creek, CO 36.6% 36.6% 0.0% 0.0% -108 dBm 76.1% 75.6% 38.0% 29.6% -115 dBm 30.0% 29.6% 26.3% 8.9% -100 dBm
Columbine, CO 100.0% 100.0% 99.3% 84.8% -89 dBm 100.0% 100.0% 99.3% 65.6% -104 dBm 100.0% 100.0% 98.0% 88.7% -83 dBm
Conifer, CO 77.8% 77.8% 27.2% 11.6% -100 dBm 70.3% 70.3% 36.9% 26.0% -116 dBm 71.9% 68.8% 63.0% 42.8% -94 dBm
Dakota Ridge, CO 100.0% 100.0% 96.7% 80.9% -89 dBm 99.5% 99.1% 99.5% 77.2% -103 dBm 100.0% 100.0% 100.0% 98.1% -80 dBm
East Pleasant View, CO 100.0% 100.0% 100.0% 100.0% -90 dBm 100.0% 100.0% 100.0% 100.0% -87 dBm 100.0% 100.0% 100.0% 100.0% -80 dBm
Edgewater, CO 100.0% 100.0% 100.0% 100.0% -85 dBm 100.0% 100.0% 100.0% 88.2% -103 dBm 100.0% 100.0% 100.0% 100.0% -77 dBm
Evergreen, CO 100.0% 100.0% 64.9% 50.4% -91 dBm 98.5% 98.5% 67.6% 57.3% -110 dBm 99.6% 99.6% 96.9% 87.8% -86 dBm
Fairmount, CO 100.0% 100.0% 91.4% 76.3% -87 dBm 99.3% 99.3% 97.1% 69.1% -106 dBm 100.0% 100.0% 99.3% 83.5% -87 dBm
Genesee, CO 100.0% 100.0% 63.1% 48.3% -95 dBm 100.0% 100.0% 49.7% 32.2% -111 dBm 100.0% 100.0% 100.0% 87.2% -90 dBm
Golden, CO 100.0% 100.0% 96.8% 88.4% -84 dBm 99.5% 99.5% 98.6% 84.7% -99 dBm 98.6% 98.6% 98.1% 94.4% -78 dBm
Idledale, CO 100.0% 100.0% 40.0% 20.0% -92 dBm 100.0% 100.0% 0.0% 0.0% -96 dBm 100.0% 100.0% 80.0% 60.0% -88 dBm
Indian Hills, CO 100.0% 100.0% 64.5% 45.5% -87 dBm 90.1% 90.1% 63.6% 35.5% -115 dBm 100.0% 100.0% 71.1% 47.1% -94 dBm
Ken Caryl, CO 100.0% 100.0% 96.8% 88.2% -84 dBm 100.0% 100.0% 97.7% 71.9% -102 dBm 99.5% 99.5% 98.6% 91.0% -83 dBm
Kittredge, CO 100.0% 100.0% 53.5% 34.9% -94 dBm 97.7% 97.7% 23.3% 18.6% -116 dBm 100.0% 100.0% 90.7% 51.2% -97 dBm
Lakeside, CO 100.0% 100.0% 100.0% 100.0% -76 dBm 100.0% 100.0% 100.0% 100.0% -82 dBm 100.0% 100.0% 100.0% 100.0% -62 dBm
Lakewood, CO 100.0% 100.0% 97.2% 85.3% -87 dBm 99.2% 98.9% 97.5% 74.4% -101 dBm 99.9% 99.9% 99.4% 94.8% -81 dBm
Morrison, CO 100.0% 100.0% 94.4% 86.1% -85 dBm 100.0% 100.0% 80.6% 25.0% -110 dBm 100.0% 100.0% 100.0% 97.2% -85 dBm
Mountain View, CO 100.0% 100.0% 100.0% 100.0% -90 dBm 100.0% 100.0% 100.0% 100.0% -95 dBm 100.0% 100.0% 100.0% 100.0% -90 dBm
Pine, CO 69.0% 68.8% 20.9% 8.0% -103 dBm 64.4% 64.3% 26.9% 19.3% -116 dBm 50.6% 49.9% 34.5% 19.8% -97 dBm
West Pleasant View, CO 100.0% 100.0% 100.0% 100.0% -76 dBm 100.0% 100.0% 100.0% 78.4% -99 dBm 100.0% 100.0% 100.0% 100.0% -73 dBm
Wheat Ridge, CO 100.0% 100.0% 99.5% 96.7% -83 dBm 100.0% 100.0% 99.5% 87.7% -101 dBm 100.0% 100.0% 100.0% 98.6% -79 dBm
Berkley, CO 100.0% 100.0% 100.0% 100.0% -81 dBm 100.0% 100.0% 98.9% 75.9% -100 dBm 100.0% 100.0% 100.0% 98.9% -78 dBm
Bow Mar, CO 100.0% 100.0% 100.0% 69.2% -92 dBm 100.0% 100.0% 100.0% 92.3% -102 dBm 100.0% 100.0% 92.3% 69.2% -93 dBm
Broomfield, CO 100.0% 100.0% 99.5% 93.4% -85 dBm 100.0% 100.0% 99.1% 81.8% -104 dBm 100.0% 100.0% 99.2% 93.4% -82 dBm
Denver, CO 99.7% 99.7% 95.0% 89.9% -90 dBm 99.7% 99.7% 93.8% 72.1% -102 dBm 98.8% 98.8% 96.5% 90.3% -80 dBm
Echo Hills, CO 78.6% 78.6% 50.0% 7.1% -106 dBm 71.4% 71.4% 35.7% 0.0% -120 dBm 64.3% 64.3% 42.9% 0.0% -102 dBm
Floyd Hill, CO 93.6% 93.6% 48.6% 21.4% -95 dBm 90.7% 90.7% 25.7% 20.7% -113 dBm 81.4% 80.7% 67.9% 41.4% -95 dBm
Highlands Ranch, CO 100.0% 100.0% 92.2% 83.7% -90 dBm 99.8% 99.8% 98.0% 74.8% -103 dBm 99.8% 99.8% 92.9% 73.6% -87 dBm
Littleton, CO 100.0% 100.0% 99.7% 91.7% -87 dBm 100.0% 100.0% 100.0% 82.1% -98 dBm 100.0% 100.0% 99.7% 97.2% -79 dBm
Superior, CO 100.0% 100.0% 88.0% 51.1% -94 dBm 100.0% 100.0% 100.0% 73.9% -98 dBm 100.0% 100.0% 75.0% 55.4% -87 dBm
Upper Bear Creek, CO 10.7% 10.7% 0.0% 0.0% -104 dBm 22.6% 22.6% 0.0% 0.0% -112 dBm 35.7% 35.7% 21.4% 0.0% -104 dBm
Westminster, CO 100.0% 100.0% 99.2% 92.4% -84 dBm 100.0% 100.0% 96.1% 72.4% -106 dBm 100.0% 100.0% 98.9% 89.8% -83 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, CO 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.