Antenna structures in St. Mary's County, Maryland
At a glance
St. Mary's County, Maryland has 95 FCC-registered antenna structures, 53 of them marked constructed. That is the 7th-largest count among the 24 Maryland counties with registrations, and 5% of the state's 1,911. The tallest constructed structure in the county is registration 1035818 near Mechanicsville at 153 m (502 ft).
Dataset updated . Refreshed from the FCC ASR weekly bulk database.
How does St. Mary's County compare with the rest of Maryland?
With 95 registrations, St. Mary's County ranks 7th of 24 counties in Maryland; Prince George's County leads the state with 209. The average registered overall height here is 67 m, roughly in line with the Maryland average of 70 m. The tallest standing structure, at 153 m, is about 2.3 times the county average.
What kinds of structures are registered in St. Mary's County?
The most common filed structure type in St. Mary's County is tower (code TOWER), with 30 registrations (31.6%). It is followed by monopole (29) and pole (11). In all, 12 different FCC structure-type codes appear in the county.
By registration status: 53 constructed, 19 granted (not yet constructed), 19 canceled, 2 dismantled and 2 terminated. Only constructed registrations describe structures the registry treats as standing; canceled, dismantled and terminated records stay listed as history.
Who owns the towers in St. Mary's County?
American Towers LLC holds the most registrations in St. Mary's County, with 11 of the 95. The next largest are Cellco Partnership (9), St. Mary's, County of (9) and APC REALTY AND EQUIPMENT CO., LLC (7). 30 owners with two or more registrations nationwide hold structures in the county.
Which places in St. Mary's County have registered structures?
Registrations in St. Mary's County list 28 different city or place names. The most frequent are Mechanicsville (17), Lexington Park (14), Leonardtown (13), California (8) and Hollywood (7).
Every registration
All 95 structures in St. Mary's County, tallest first
| # | Structure | Height | Type | Status |
|---|---|---|---|---|
| 1 | Mechanicsville · 1035818 | 153 m | Tower (type not specified) | Constructed |
| 2 | Piney Point · 1207452 | 152 m | Tower (type not specified) | Canceled |
| 3 | Hillville · 1053371 | 114 m | Tower (type not specified) | Constructed |
| 4 | Leonardtown · 1299558 | 114 m | Lattice tower | Constructed |
| 5 | Mechanicsville · 1053370 | 112 m | Tower (type not specified) | Constructed |
| 6 | California · 1048296 | 110 m | Guyed tower | Constructed |
| 7 | Leonardtown · 1279484 | 107 m | Unspecified structure | Granted (not yet constructed) |
| 8 | Great Mills · 1286709 | 106 m | Lattice tower | Constructed |
| 9 | Bushwood · 1269134 | 106 m | Tower (type not specified) | Constructed |
| 10 | Valley Lee · 1269136 | 106 m | Tower (type not specified) | Canceled |
| 11 | Leonardtown · 1273613 | 106 m | Tower (type not specified) | Constructed |
| 12 | St. James · 1273614 | 106 m | Tower (type not specified) | Constructed |
| 13 | Valley Lee · 1276276 | 106 m | Tower (type not specified) | Canceled |
| 14 | Mechanicsville · 1229878 | 106 m | Tower (type not specified) | Constructed |
| 15 | Mechanicsville · 1299535 | 105 m | Lattice tower | Granted (not yet constructed) |
| 16 | Ridge · 1300387 | 105 m | Lattice tower | Granted (not yet constructed) |
| 17 | Leonardtown · 1224392 | 98 m | Lattice tower | Constructed |
| 18 | Mechanicsville · 1277831 | 98 m | Unspecified structure | Granted (not yet constructed) |
| 19 | Ridge · 1279485 | 98 m | Unspecified structure | Granted (not yet constructed) |
| 20 | Hollywood · 1280670 | 98 m | Unspecified structure | Granted (not yet constructed) |
| 21 | Hollywood · 1035844 | 91 m | Tower (type not specified) | Constructed |
| 22 | Leonardtown · 1059228 | 85 m | Tower (type not specified) | Constructed |
| 23 | California · 1048294 | 84 m | Antenna tower array (tower 4 of 4) | Constructed |
| 24 | California · 1048295 | 84 m | Antenna tower array (tower 3 of 4) | Constructed |
| 25 | California · 1048297 | 84 m | Antenna tower array (tower 1 of 4) | Constructed |
| 26 | Mechanicsville · 1035750 | 81 m | Tower (type not specified) | Constructed |
| 27 | Mechanicsville · 1207760 | 79 m | Tower (type not specified) | Canceled |
| 28 | Callaway · 1209600 | 79 m | Tower (type not specified) | Canceled |
| 29 | Mechanicsville · 1211670 | 79 m | Tower (type not specified) | Canceled |
| 30 | Lexington Park · 1226926 | 75 m | Lattice tower | Granted (not yet constructed) |
| 31 | Charlotte Hall · 1054133 | 70 m | Lattice tower | Constructed |
| 32 | Lexington Park · 1037387 | 70 m | Guyed tower | Constructed |
| 33 | Mechanicsville · 1293154 | 62 m | Monopole | Canceled |
| 34 | Great Mills · 1299631 | 62 m | Monopole | Constructed |
| 35 | Ridge · 1250414 | 61 m | Monopole | Constructed |
| 36 | Leonardtown · 1228934 | 61 m | Pole | Canceled |
| 37 | Mechanicsville · 1056066 | 61 m | Lattice tower | Constructed |
| 38 | Morganza · 1211574 | 61 m | Tower (type not specified) | Canceled |
| 39 | Park Hall · 1220820 | 61 m | Pole | Canceled |
| 40 | Mechanicsville · 1222295 | 61 m | Tower (type not specified) | Terminated |
| 41 | Dameron · 1224375 | 61 m | Lattice tower | Constructed |
| 42 | California · 1234079 | 61 m | Monopole | Constructed |
| 43 | Mechanicsville · 1292761 | 61 m | Monopole | Constructed |
| 44 | Lexington Park · 1297694 | 61 m | Monopole | Constructed |
| 45 | Mechanicsville · 1297965 | 61 m | Monopole | Constructed |
| 46 | Leonardtown · 1298976 | 61 m | Monopole | Granted (not yet constructed) |
| 47 | Mechanicsville · 1299630 | 61 m | Monopole | Constructed |
| 48 | Leonardtown · 1304382 | 61 m | Monopole | Constructed |
| 49 | Mechanicsville · 1315880 | 61 m | Monopole | Constructed |
| 50 | Mechanicsville · 1330958 | 61 m | Monopole | Constructed |
| 51 | Mechanicsville · 1331279 | 61 m | Monopole | Granted (not yet constructed) |
| 52 | Drayden · 1331824 | 61 m | Monopole | Granted (not yet constructed) |
| 53 | Mattapany · 1227670 | 61 m | Tower (type not specified) | Canceled |
| 54 | Avenue · 1267123 | 61 m | Tower (type not specified) | Canceled |
| 55 | Lexington Park · 1292646 | 61 m | Monopole | Canceled |
| 56 | Leonardtown · 1293710 | 61 m | Monopole | Canceled |
| 57 | Leonardtown · 1300161 | 61 m | Monopole | Constructed |
| 58 | Leonardtown · 1237845 | 60 m | Monopole | Constructed |
| 59 | Avenue · 1267124 | 60 m | Monopole | Constructed |
| 60 | Park Hill · 1234832 | 59 m | Pole | Constructed |
| 61 | Scotland · 1053449 | 59 m | Tower (type not specified) | Constructed |
| 62 | Hollywood · 1289179 | 58 m | Monopole | Constructed |
| 63 | Lexington Park · 1202706 | 57 m | Tower (type not specified) | Granted (not yet constructed) |
| 64 | Lexington Park · 1035935 | 57 m | Tower (type not specified) | Constructed |
| 65 | Morganza · 1279097 | 56 m | Pole | Granted (not yet constructed) |
| 66 | Hollywood · 1252830 | 55 m | Monopole | Constructed |
| 67 | California · 1297646 | 55 m | Monopole | Constructed |
| 68 | Ridge · 1324124 | 53 m | Lattice tower | Granted (not yet constructed) |
| 69 | St Inigoes · 1297774 | 52 m | Monopole | Granted (not yet constructed) |
| 70 | Tall Timbers · 1295199 | 50 m | Monopole | Constructed |
| 71 | Leonardtown · 1230360 | 48 m | Pole | Canceled |
| 72 | Hollywood · 1248574 | 48 m | Tower (type not specified) | Constructed |
| 73 | Valley Lee · 1264971 | 47 m | Monopole | Constructed |
| 74 | Lexington Park · 1301313 | 47 m | Monopole | Canceled |
| 75 | Leonardtown · 1241204 | 46 m | Pole | Terminated |
| 76 | Lexington Park · 1294370 | 45 m | Oil rig | Canceled |
| 77 | Lexington Park · 1327915 | 45 m | Monopole | Constructed |
| 78 | Patuxent River · 1214115 | 45 m | Pole | Constructed |
| 79 | Ridge · 1035991 | 44 m | Pole | Constructed |
| 80 | Lexington Park · 1063250 | 43 m | Tower (type not specified) | Constructed |
| 81 | Ridge · 1299038 | 43 m | Lattice tower | Constructed |
| 82 | Valley Lee · 1252832 | 43 m | Pole | Granted (not yet constructed) |
| 83 | Lexington Park · 1301368 | 42 m | Guyed tower | Granted (not yet constructed) |
| 84 | Patuxent River · 1316641 | 40 m | Monopole | Constructed |
| 85 | Lexington Park · 1288323 | 40 m | Monopole | Canceled |
| 86 | St. Mary'S City · 1281112 | 38 m | Tank | Constructed |
| 87 | St. Mary'S City · 1282284 | 37 m | Tower (type not specified) | Canceled |
| 88 | Saint Mary'S City · 1261965 | 35 m | Tower (type not specified) | Granted (not yet constructed) |
| 89 | Saint Marys City · 1274421 | 35 m | Tower (type not specified) | Constructed |
| 90 | Hollywood · 1265909 | 31 m | Tower (type not specified) | Constructed |
| 91 | California · 1217008 | 29 m | Pole | Constructed |
| 92 | Lexington Park · 1201592 | 20 m | Pole | Dismantled |
| 93 | Lexington Park · 1305531 | 17 m | Utility pole | Dismantled |
| 94 | Hollywood · 1228487 | 14 m | Tower (type not specified) | Granted (not yet constructed) |
| 95 | California · 1214993 | 11 m | Building | Granted (not yet constructed) |
Frequently asked questions
How many cell towers are in St. Mary's County, MD?
The FCC Antenna Structure Registration database lists 95 registered antenna structures in St. Mary's County, Maryland, 53 of them constructed. Registration is generally required only for structures taller than about 60 m or near airports, so shorter cell sites may not appear.
What is the tallest tower in St. Mary's County?
The tallest constructed registered structure in St. Mary's County is registration 1035818, a tower near Mechanicsville at 153 m (502 ft) overall height.
Who owns the most towers in St. Mary's County?
American Towers LLC holds the most registrations in St. Mary's County (11), followed by Cellco Partnership (9).
What kind of towers are in St. Mary's County?
Tower (type not specified) is the most common filed type (30 of 95 registrations), then monopole (29).
More in Maryland
About this data
Source: FCC Antenna Structure Registration (ASR) database, as published October 20, 2026 — TowerCensus refreshes it weekly. See the methodology for how records are matched, cleaned and scored.
Cite as: TowerCensus, “Antenna structures in St. Mary's County, Maryland”, https://towercensus.com/towers/maryland/county/st-mary-s-county (data as of October 20, 2026).