Carrierlytics County Coverage Guide

Montgomery County, MD Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Montgomery County, MD.

Using FCC mobile coverage data across cities and ZIP codes in Montgomery County, MD, Carrierlytics compares the top-performing networks and the cheapest plans that use them.

Montgomery County, MD

Cell phone coverage map for Montgomery County, MD

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 Carrierlytics.

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Cell phone coverage rankings by network in Montgomery County, MD

#1

T-Mobile

Coverage Score 93.3
In Montgomery County, MD
Overall
97.3%
4G LTE
97.2% avg. -87 dBm 4G LTE signal where 4G LTE coverage exists: avg. -87 dBm
5G
92.7% avg. -84 dBm 5G signal where 5G coverage exists: avg. -84 dBm
Fast 5G
80.0% avg. -81 dBm Fast 5G signal where Fast 5G coverage exists: avg. -81 dBm
#2

AT&T

Coverage Score 77.8
In Montgomery County, MD
Overall
99.8%
4G LTE
99.7% avg. -98 dBm 4G LTE signal where 4G LTE coverage exists: avg. -98 dBm
5G
91.9% avg. -107 dBm 5G signal where 5G coverage exists: avg. -107 dBm
Fast 5G
64.1% avg. -104 dBm Fast 5G signal where Fast 5G coverage exists: avg. -104 dBm
#3

Verizon

Coverage Score 77.2
In Montgomery County, MD
Overall
99.0%
4G LTE
99.0% avg. -88 dBm 4G LTE signal where 4G LTE coverage exists: avg. -88 dBm
5G
57.4% avg. -95 dBm 5G signal where 5G coverage exists: avg. -95 dBm
Fast 5G
37.7% avg. -90 dBm Fast 5G signal where Fast 5G coverage exists: avg. -90 dBm
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Coverage by city in Montgomery County, MD

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

City Verizon AT&T T-Mobile
Ashton, MD 100.0% 100.0% 54.3% 37.8% 100.0% 100.0% 82.7% 60.6% 100.0% 100.0% 100.0% 98.4%
Ashton-Sandy Spring, MD 100.0% 100.0% 46.5% 24.6% 100.0% 100.0% 73.1% 53.8% 99.6% 99.6% 95.4% 85.0%
Aspen Hill, MD 100.0% 100.0% 70.7% 39.7% 100.0% 99.2% 99.6% 78.7% 100.0% 99.6% 98.7% 89.5%
Barnesville, MD 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 50.0% 30.0% 100.0% 100.0% 100.0% 100.0%
Beallsville, MD 100.0% 100.0% 23.7% 9.2% 100.0% 100.0% 90.8% 76.3% 100.0% 100.0% 57.9% 32.9%
Bethesda, MD 100.0% 100.0% 86.7% 61.4% 100.0% 100.0% 99.1% 71.7% 100.0% 100.0% 100.0% 99.4%
Boyds, MD 98.5% 98.5% 33.6% 17.2% 99.9% 99.9% 88.6% 69.1% 97.8% 97.5% 93.5% 71.7%
Brinklow, MD 100.0% 100.0% 22.0% 2.4% 100.0% 100.0% 24.4% 12.2% 100.0% 100.0% 100.0% 78.0%
Brookeville, MD 100.0% 100.0% 66.7% 66.7% 100.0% 100.0% 66.7% 0.0% 100.0% 100.0% 100.0% 100.0%
Brookmont, MD 100.0% 100.0% 61.8% 23.5% 100.0% 94.1% 97.1% 67.6% 100.0% 100.0% 100.0% 97.1%
Burnt Mills, MD 100.0% 100.0% 100.0% 83.3% 100.0% 100.0% 100.0% 55.6% 100.0% 100.0% 100.0% 100.0%
Burtonsville, MD 99.0% 99.0% 40.1% 20.3% 100.0% 100.0% 95.0% 54.0% 99.5% 99.5% 94.1% 83.7%
Cabin John, MD 100.0% 100.0% 93.5% 71.0% 100.0% 100.0% 100.0% 90.3% 100.0% 100.0% 100.0% 100.0%
Calverton, MD 100.0% 100.0% 96.6% 78.4% 100.0% 100.0% 100.0% 84.5% 100.0% 100.0% 100.0% 98.3%
Chevy Chase, MD 100.0% 100.0% 85.7% 75.2% 100.0% 100.0% 100.0% 71.4% 100.0% 100.0% 100.0% 100.0%
Chevy Chase Census Place 2416620, MD 100.0% 100.0% 40.0% 40.0% 100.0% 100.0% 100.0% 80.0% 100.0% 100.0% 100.0% 100.0%
Chevy Chase Census Place 2416625, MD 100.0% 100.0% 98.4% 92.2% 100.0% 100.0% 100.0% 78.1% 100.0% 100.0% 100.0% 100.0%
Chevy Chase Section Five, MD 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 66.7% 100.0% 100.0% 100.0% 100.0%
Chevy Chase Section Three, MD 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 50.0% 100.0% 100.0% 100.0% 100.0%
Chevy Chase View, MD 100.0% 100.0% 100.0% 0.0% 100.0% 100.0% 100.0% 50.0% 100.0% 100.0% 100.0% 100.0%
Chevy Chase Village, MD 100.0% 100.0% 80.0% 60.0% 100.0% 100.0% 100.0% 60.0% 100.0% 100.0% 100.0% 100.0%
Clarksburg, MD 100.0% 100.0% 88.5% 66.3% 99.6% 99.6% 94.7% 71.2% 99.2% 99.2% 98.8% 94.7%
Cloverly, MD 99.2% 99.2% 61.1% 38.9% 100.0% 100.0% 99.2% 76.6% 99.2% 99.2% 97.2% 69.0%
Colesville, MD 100.0% 100.0% 57.4% 23.3% 100.0% 100.0% 100.0% 70.5% 100.0% 100.0% 96.1% 89.1%
Damascus, MD 100.0% 100.0% 63.2% 34.5% 100.0% 100.0% 98.6% 61.8% 99.2% 99.2% 97.2% 83.3%
Darnestown, MD 95.7% 95.7% 22.9% 10.1% 99.8% 99.8% 70.5% 32.4% 87.9% 87.0% 77.1% 55.8%
Derwood, MD 100.0% 100.0% 94.1% 88.2% 100.0% 100.0% 100.0% 52.9% 100.0% 100.0% 100.0% 100.0%
Dickerson, MD 96.9% 96.7% 13.4% 5.3% 98.2% 97.9% 85.8% 61.9% 88.4% 88.4% 71.1% 47.4%
Fairland, MD 100.0% 100.0% 79.5% 63.1% 100.0% 100.0% 97.5% 81.1% 97.5% 97.5% 96.7% 88.5%
Flower Hill, MD 100.0% 100.0% 94.2% 67.3% 100.0% 100.0% 100.0% 88.5% 100.0% 100.0% 100.0% 96.2%
Forest Glen, MD 100.0% 100.0% 84.6% 57.7% 100.0% 100.0% 100.0% 61.5% 100.0% 100.0% 100.0% 100.0%
Four Corners, MD 100.0% 100.0% 94.7% 60.5% 100.0% 100.0% 100.0% 65.8% 97.4% 97.4% 97.4% 97.4%
Friendship Heights Village, MD 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 50.0% 100.0% 100.0% 100.0% 100.0%
Gaithersburg, MD 100.0% 100.0% 90.2% 76.7% 100.0% 100.0% 99.6% 75.2% 100.0% 100.0% 100.0% 99.2%
Garrett Park, MD 100.0% 100.0% 100.0% 28.6% 100.0% 100.0% 100.0% 71.4% 100.0% 100.0% 100.0% 100.0%
Germantown, MD 100.0% 100.0% 87.2% 61.8% 100.0% 100.0% 91.4% 59.7% 100.0% 100.0% 99.8% 98.4%
Glen Echo, MD 100.0% 100.0% 66.7% 0.0% 100.0% 100.0% 100.0% 66.7% 100.0% 100.0% 100.0% 100.0%
Glenmont, MD 100.0% 100.0% 91.7% 65.3% 100.0% 100.0% 100.0% 83.3% 100.0% 100.0% 100.0% 100.0%
Hillandale, MD 100.0% 100.0% 54.3% 17.4% 100.0% 100.0% 97.8% 78.3% 100.0% 100.0% 100.0% 95.7%
Kemp Mill, MD 100.0% 100.0% 84.1% 57.1% 100.0% 100.0% 100.0% 68.3% 100.0% 100.0% 100.0% 96.8%
Kensington, MD 100.0% 100.0% 100.0% 90.9% 100.0% 100.0% 100.0% 72.7% 100.0% 100.0% 100.0% 100.0%
Layhill, MD 100.0% 100.0% 83.3% 64.3% 100.0% 100.0% 100.0% 78.6% 100.0% 100.0% 97.6% 85.7%
Laytonsville, MD 100.0% 100.0% 100.0% 92.6% 100.0% 100.0% 96.3% 88.9% 100.0% 100.0% 100.0% 100.0%
Leisure World, MD 100.0% 100.0% 96.6% 65.5% 100.0% 100.0% 100.0% 89.7% 100.0% 100.0% 100.0% 100.0%
Martin’s Additions, MD 100.0% 100.0% 33.3% 33.3% 100.0% 100.0% 100.0% 33.3% 100.0% 100.0% 100.0% 100.0%
Montgomery Village, MD 100.0% 100.0% 89.3% 62.1% 100.0% 100.0% 99.0% 91.3% 100.0% 100.0% 100.0% 86.4%
North Bethesda, MD 100.0% 100.0% 86.0% 65.3% 100.0% 100.0% 98.2% 75.7% 100.0% 100.0% 100.0% 99.5%
North Chevy Chase, MD 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 0.0% 100.0% 100.0% 100.0% 100.0%
North Kensington, MD 100.0% 100.0% 78.9% 52.6% 100.0% 100.0% 100.0% 60.5% 100.0% 100.0% 100.0% 100.0%
North Potomac, MD 100.0% 100.0% 84.9% 61.4% 100.0% 100.0% 96.4% 59.0% 100.0% 100.0% 99.4% 94.6%

About The Coverage Data

Coverage and signal estimates are derived by Carrierlytics 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 Montgomery County, MD 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.