Carrierlytics State Coverage Guide

Maryland Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Maryland.

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



Cell phone coverage map for Maryland

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 Maryland

#1

T-Mobile

Coverage Score 81.2
In Maryland
Overall
82.6%
4G LTE
82.3% avg. -92 dBm 4G LTE signal where 4G LTE coverage exists: avg. -92 dBm
5G
76.2% avg. -88 dBm 5G signal where 5G coverage exists: avg. -88 dBm
Fast 5G
58.7% avg. -84 dBm Fast 5G signal where Fast 5G coverage exists: avg. -84 dBm
#2

AT&T

Coverage Score 72.5
In Maryland
Overall
94.5%
4G LTE
93.1% avg. -105 dBm 4G LTE signal where 4G LTE coverage exists: avg. -105 dBm
5G
79.0% avg. -109 dBm 5G signal where 5G coverage exists: avg. -109 dBm
Fast 5G
55.6% avg. -107 dBm Fast 5G signal where Fast 5G coverage exists: avg. -107 dBm
#3

Verizon

Coverage Score 65.7
In Maryland
Overall
93.3%
4G LTE
93.3% avg. -92 dBm 4G LTE signal where 4G LTE coverage exists: avg. -92 dBm
5G
30.8% avg. -93 dBm 5G signal where 5G coverage exists: avg. -93 dBm
Fast 5G
20.3% avg. -88 dBm Fast 5G signal where Fast 5G coverage exists: avg. -88 dBm
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Coverage by county in Maryland

Counties are shown for statewide comparison. Coverage percentages use land-area only coverage.

County Verizon AT&T T-Mobile
Allegany County, MD 78.2% 78.0% 27.8% 18.4% 76.8% 72.5% 65.8% 51.9% 78.7% 78.7% 70.3% 51.7%
Anne Arundel County, MD 99.1% 99.1% 51.9% 36.1% 99.0% 98.7% 90.2% 60.2% 96.9% 96.8% 92.4% 76.3%
Baltimore County, MD 98.4% 98.4% 48.8% 36.6% 98.8% 98.1% 90.3% 61.7% 88.4% 88.3% 82.3% 66.7%
Baltimore City County, MD 100.0% 100.0% 96.1% 88.6% 99.5% 99.1% 99.0% 77.2% 99.5% 99.5% 99.3% 98.6%
Calvert County, MD 99.4% 99.4% 12.8% 7.1% 97.0% 89.8% 81.2% 54.1% 96.5% 96.4% 92.0% 70.8%
Caroline County, MD 99.2% 99.2% 27.3% 17.2% 99.0% 99.0% 80.8% 61.9% 81.7% 81.6% 73.8% 48.7%
Carroll County, MD 99.3% 99.3% 41.8% 26.3% 99.3% 99.0% 92.2% 61.7% 92.1% 92.1% 86.1% 69.0%
Cecil County, MD 97.1% 97.0% 54.5% 33.8% 98.5% 98.5% 77.9% 62.1% 84.2% 84.1% 78.9% 64.4%
Charles County, MD 95.0% 95.0% 22.0% 12.9% 96.1% 94.8% 74.9% 45.5% 82.8% 82.5% 76.9% 54.5%
Dorchester County, MD 93.1% 93.1% 8.2% 4.0% 92.3% 88.5% 70.7% 47.9% 62.4% 61.9% 54.6% 34.0%
Frederick County, MD 96.3% 96.3% 26.3% 16.1% 95.6% 95.4% 85.8% 58.6% 93.0% 93.0% 87.9% 73.4%
Garrett County, MD 57.8% 57.4% 13.1% 6.8% 77.2% 71.4% 59.3% 44.4% 65.2% 65.1% 55.4% 37.1%
Harford County, MD 98.9% 98.9% 33.5% 20.2% 98.4% 97.8% 91.5% 57.5% 91.5% 91.4% 87.5% 73.3%
Howard County, MD 99.1% 99.1% 70.7% 51.9% 99.4% 99.3% 93.6% 63.8% 97.0% 97.0% 94.3% 83.7%
Kent County, MD 88.9% 88.9% 5.7% 2.1% 93.1% 93.1% 68.5% 42.0% 70.8% 70.4% 64.7% 41.8%
Montgomery County, MD 99.0% 99.0% 57.4% 37.7% 99.8% 99.7% 91.9% 64.1% 97.3% 97.2% 92.7% 80.0%
Prince George’s County, MD 99.2% 99.2% 49.3% 34.3% 99.0% 98.9% 88.8% 64.6% 98.7% 98.6% 95.7% 85.5%
Queen Anne’s County, MD 96.1% 96.1% 20.3% 12.6% 97.0% 97.0% 74.9% 55.7% 79.0% 78.7% 72.8% 53.3%
Somerset County, MD 91.2% 91.2% 6.8% 3.6% 94.1% 92.0% 71.7% 54.1% 58.1% 58.1% 40.7% 20.0%
St. Mary’s County, MD 98.3% 98.3% 18.4% 10.3% 98.2% 97.7% 73.3% 51.9% 86.6% 86.4% 78.5% 54.0%
Talbot County, MD 96.0% 96.0% 19.6% 11.4% 95.2% 94.0% 75.2% 53.3% 76.0% 75.3% 66.8% 43.7%
Washington County, MD 96.8% 96.8% 35.3% 20.7% 91.4% 89.7% 80.0% 53.7% 85.4% 85.3% 79.7% 66.7%
Wicomico County, MD 91.9% 91.9% 26.7% 20.8% 93.5% 93.3% 72.0% 55.1% 70.4% 69.7% 64.5% 45.5%
Worcester County, MD 95.2% 95.2% 13.8% 9.5% 94.0% 93.8% 63.5% 50.4% 66.4% 64.9% 61.6% 42.5%

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 Maryland 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.