T-Mobile currently ranks first for coverage in this area, with a coverage score of 80.8. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.Coverage rankings for Maryland
| Rank | Carrier | Score | Overall | 4G LTE | 5G | Fast 5G | Average Signal |
|---|---|---|---|---|---|---|---|
| 1 | T-Mobile | 80.8 | 82.6% | 82.3% | 76.2% | 58.7% | -89 dBm |
| 2 | AT&T | 80.1 | 94.5% | 93.1% | 79.0% | 55.6% | -111 dBm |
| 3 | Verizon | 66.0 | 93.3% | 93.3% | 30.8% | 20.3% | -95 dBm |
Scores include coverage area, network type, and average signal strength.
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.
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 Maryland
T-Mobile
- Overall
- 82.6%
- 4G LTE
- 82.3%
- 5G
- 76.2%
- Fast 5G
- 58.7%
AT&T
- Overall
- 94.5%
- 4G LTE
- 93.1%
- 5G
- 79.0%
- Fast 5G
- 55.6%
Verizon
- Overall
- 93.3%
- 4G LTE
- 93.3%
- 5G
- 30.8%
- Fast 5G
- 20.3%
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.
Pricing, network access, switching terms, and home internet availability may vary.
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% -95 dBm | 76.8% 72.5% 65.8% 51.9% -111 dBm | 78.7% 78.7% 70.3% 51.7% -92 dBm |
| Anne Arundel County, MD | 99.1% 99.1% 51.9% 36.1% -93 dBm | 99.0% 98.7% 90.2% 60.2% -106 dBm | 96.9% 96.8% 92.4% 76.3% -87 dBm |
| Baltimore County, MD | 98.4% 98.4% 48.8% 36.6% -93 dBm | 98.8% 98.1% 90.3% 61.7% -107 dBm | 88.4% 88.3% 82.3% 66.7% -87 dBm |
| Baltimore City County, MD | 100.0% 100.0% 96.1% 88.6% -86 dBm | 99.5% 99.1% 99.0% 77.2% -93 dBm | 99.5% 99.5% 99.3% 98.6% -74 dBm |
| Calvert County, MD | 99.4% 99.4% 12.8% 7.1% -94 dBm | 97.0% 89.8% 81.2% 54.1% -112 dBm | 96.5% 96.4% 92.0% 70.8% -90 dBm |
| Caroline County, MD | 99.2% 99.2% 27.3% 17.2% -95 dBm | 99.0% 99.0% 80.8% 61.9% -113 dBm | 81.7% 81.6% 73.8% 48.7% -93 dBm |
| Carroll County, MD | 99.3% 99.3% 41.8% 26.3% -93 dBm | 99.3% 99.0% 92.2% 61.7% -108 dBm | 92.1% 92.1% 86.1% 69.0% -88 dBm |
| Cecil County, MD | 97.1% 97.0% 54.5% 33.8% -97 dBm | 98.5% 98.5% 77.9% 62.1% -112 dBm | 84.2% 84.1% 78.9% 64.4% -88 dBm |
| Charles County, MD | 95.0% 95.0% 22.0% 12.9% -97 dBm | 96.1% 94.8% 74.9% 45.5% -113 dBm | 82.8% 82.5% 76.9% 54.5% -91 dBm |
| Dorchester County, MD | 93.1% 93.1% 8.2% 4.0% -96 dBm | 92.3% 88.5% 70.7% 47.9% -115 dBm | 62.4% 61.9% 54.6% 34.0% -95 dBm |
| Frederick County, MD | 96.3% 96.3% 26.3% 16.1% -94 dBm | 95.6% 95.4% 85.8% 58.6% -110 dBm | 93.0% 93.0% 87.9% 73.4% -87 dBm |
| Garrett County, MD | 57.8% 57.4% 13.1% 6.8% -99 dBm | 77.2% 71.4% 59.3% 44.4% -114 dBm | 65.2% 65.1% 55.4% 37.1% -94 dBm |
| Harford County, MD | 98.9% 98.9% 33.5% 20.2% -94 dBm | 98.4% 97.8% 91.5% 57.5% -108 dBm | 91.5% 91.4% 87.5% 73.3% -87 dBm |
| Howard County, MD | 99.1% 99.1% 70.7% 51.9% -93 dBm | 99.4% 99.3% 93.6% 63.8% -105 dBm | 97.0% 97.0% 94.3% 83.7% -84 dBm |
| Kent County, MD | 88.9% 88.9% 5.7% 2.1% -98 dBm | 93.1% 93.1% 68.5% 42.0% -115 dBm | 70.8% 70.4% 64.7% 41.8% -93 dBm |
| Montgomery County, MD | 99.0% 99.0% 57.4% 37.7% -95 dBm | 99.8% 99.7% 91.9% 64.1% -107 dBm | 97.3% 97.2% 92.7% 80.0% -84 dBm |
| Prince George’s County, MD | 99.2% 99.2% 49.3% 34.3% -95 dBm | 99.0% 98.9% 88.8% 64.6% -106 dBm | 98.7% 98.6% 95.7% 85.5% -83 dBm |
| Queen Anne’s County, MD | 96.1% 96.1% 20.3% 12.6% -95 dBm | 97.0% 97.0% 74.9% 55.7% -114 dBm | 79.0% 78.7% 72.8% 53.3% -91 dBm |
| Somerset County, MD | 91.2% 91.2% 6.8% 3.6% -97 dBm | 94.1% 92.0% 71.7% 54.1% -115 dBm | 58.1% 58.1% 40.7% 20.0% -97 dBm |
| St. Mary’s County, MD | 98.3% 98.3% 18.4% 10.3% -95 dBm | 98.2% 97.7% 73.3% 51.9% -113 dBm | 86.6% 86.4% 78.5% 54.0% -92 dBm |
| Talbot County, MD | 96.0% 96.0% 19.6% 11.4% -97 dBm | 95.2% 94.0% 75.2% 53.3% -114 dBm | 76.0% 75.3% 66.8% 43.7% -94 dBm |
| Washington County, MD | 96.8% 96.8% 35.3% 20.7% -96 dBm | 91.4% 89.7% 80.0% 53.7% -109 dBm | 85.4% 85.3% 79.7% 66.7% -87 dBm |
| Wicomico County, MD | 91.9% 91.9% 26.7% 20.8% -93 dBm | 93.5% 93.3% 72.0% 55.1% -113 dBm | 70.4% 69.7% 64.5% 45.5% -91 dBm |
| Worcester County, MD | 95.2% 95.2% 13.8% 9.5% -96 dBm | 94.0% 93.8% 63.5% 50.4% -114 dBm | 66.4% 64.9% 61.6% 42.5% -92 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 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.