| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| St. Leonard | city | Maryland | United States | 38.47 | -76.51 | 98 | |
| Stab | city | Maryland | United States | 39.29 | -76.52 | 49 | |
| Stablers Manor | city | Maryland | United States | 39.66 | -76.65 | 830 | |
| Stablersville | city | Maryland | United States | 39.65 | -76.62 | 830 | |
| Stafford | city | Maryland | United States | 38.97 | -76.89 | 98 | |
| Stafford (historical) | city | Maryland | United States | 39.62 | -76.16 | 95 | |
| Stafford Heights | city | Maryland | United States | 38.86 | -75.82 | 19 | |
| Stanbrook | city | Maryland | United States | 39.26 | -76.51 | 3 | |
| Standard | city | Maryland | United States | 39.42 | -79.18 | 1735 | |
| Stanley | city | Maryland | United States | 39.70 | -78.15 | 830 | |
| Stansbury Estates | city | Maryland | United States | 39.32 | -76.42 | 0 | |
| Stanton Heights | city | Maryland | United States | 39.49 | -77.08 | 830 | |
| Starkey Corner | city | Maryland | United States | 39.12 | -76.01 | 49 | |
| Starr | city | Maryland | United States | 38.98 | -76.01 | 45 | |
| Starview Estates | city | Maryland | United States | 39.50 | -76.93 | 830 | |
| Station Roads | city | Maryland | United States | 39.48 | -77.58 | 830 | |
| Staubs Thurmont Acres | city | Maryland | United States | 39.64 | -77.40 | 830 | |
| Stauffer | city | Maryland | United States | 39.47 | -77.33 | 347 | |
| Steeplechase | city | Maryland | United States | 39.62 | -76.77 | 830 | |
| Steeplechase Manor | city | Maryland | United States | 39.58 | -76.46 | 830 | |
| Stellas Venture | city | Maryland | United States | 38.44 | -75.50 | 65 | |
| Stemmers Run | city | Maryland | United States | 39.33 | -76.47 | 45 | |
| Stephen Knolls | city | Maryland | United States | 39.03 | -77.05 | 351 | |
| Sterner Heights Estates | city | Maryland | United States | 39.70 | -76.88 | 830 | |
| Steuart Corner | city | Maryland | United States | 38.93 | -76.57 | 16 | |
| Steuart Level | city | Maryland | United States | 38.93 | -76.57 | 95 | |
| Stevens Corner | city | Maryland | United States | 39.14 | -75.90 | 49 | |
| Stevens Forest | city | Maryland | United States | 39.20 | -76.84 | 364 | |
| Stevenson | city | Maryland | United States | 39.41 | -76.71 | 830 | |
| Stevenson Garden Estates | city | Maryland | United States | 39.54 | -77.07 | 830 | |
| Stevenson Park | city | Maryland | United States | 39.13 | -76.65 | 98 | |
| Stevensville | city | Maryland | United States | 38.98 | -76.31 | 3 | |
| Stevenswood | city | Maryland | United States | 39.36 | -76.78 | 830 | |
| Steward Manor | city | Maryland | United States | 39.09 | -76.84 | 144 | |
| Stewart Corner | city | Maryland | United States | 39.14 | -76.69 | 164 | |
| Stewart Town | city | Maryland | United States | 39.18 | -77.19 | 400 | |
| Stewarts Landing | city | Maryland | United States | 39.09 | -76.54 | 13 | |
| Stewarts Purchase | city | Maryland | United States | 39.09 | -76.60 | 49 | |
| Steyer | city | Maryland | United States | 39.31 | -79.31 | 2509 | |
| Still Pond | city | Maryland | United States | 39.33 | -76.05 | 49 | |
| Stillmeadow | city | Maryland | United States | 39.11 | -76.71 | 104 | |
| Stilltown (historical) | city | Maryland | United States | 38.48 | -76.82 | 147 | |
| Stinnett | city | Maryland | United States | 38.70 | -76.54 | 39 | |
| Stirrup Run | city | Maryland | United States | 39.61 | -76.41 | 331 | |
| Stoakley | city | Maryland | United States | 38.56 | -76.60 | 98 | |
| Stockman | city | Maryland | United States | 39.40 | -77.49 | 830 | |
| Stockman Estates | city | Maryland | United States | 39.37 | -77.55 | 830 | |
| Stockton | city | Maryland | United States | 39.47 | -76.38 | 269 | |
| Stockton | city | Maryland | United States | 38.05 | -75.41 | 19 | |
| Stockton | city | Maryland | United States | 39.53 | -76.57 | 830 | |
| Stockton Green | city | Maryland | United States | 39.48 | -76.36 | 193 | |
| Stockton Woods | city | Maryland | United States | 39.53 | -76.60 | 830 | |
| Stoddard | city | Maryland | United States | 39.53 | -76.65 | 830 | |
| Stone Barn Station | city | Maryland | United States | 39.34 | -77.37 | 830 | |
| Stone Farm | city | Maryland | United States | 38.64 | -76.64 | 104 | |
| Stone House Village | city | Maryland | United States | 39.43 | -77.04 | 830 | |
| Stone Manor | city | Maryland | United States | 39.56 | -77.25 | 830 | |
| Stonebraker (historical) | city | Maryland | United States | 39.36 | -77.69 | 830 | |
| Stonebridge | city | Maryland | United States | 39.09 | -77.22 | 416 | |
| Stonebrook | city | Maryland | United States | 39.17 | -76.86 | 265 | |
| Stonecrest Hills | city | Maryland | United States | 39.26 | -76.81 | 396 | |
| Stonegate Farms | city | Maryland | United States | 39.43 | -77.47 | 400 | |
| Stonegate Village | city | Maryland | United States | 38.99 | -76.68 | 134 | |
| Stonehaven | city | Maryland | United States | 39.15 | -76.56 | 16 | |
| Stonehedge | city | Maryland | United States | 39.55 | -76.36 | 393 | |
| Stonehedge Estates | city | Maryland | United States | 38.36 | -75.67 | 19 | |
| Stonehurst | city | Maryland | United States | 39.71 | -77.34 | 830 | |
| Stonelake | city | Maryland | United States | 39.35 | -77.23 | 830 | |
| Stoneleigh | city | Maryland | United States | 39.38 | -76.60 | 830 | |
| Stoneleigh | city | Maryland | United States | 39.54 | -76.36 | 344 | |
| Stoneleigh Square | city | Maryland | United States | 39.43 | -76.32 | 98 | |
| Stonemyer Manor | city | Maryland | United States | 39.71 | -77.24 | 400 | |
| Stoneridge | city | Maryland | United States | 39.16 | -77.27 | 298 | |
| Stonewall Manor Estates | city | Maryland | United States | 39.32 | -77.43 | 344 | |
| Stonewood | city | Maryland | United States | 39.11 | -76.88 | 249 | |
| Stoney Brook | city | Maryland | United States | 39.06 | -77.09 | 275 | |
| Stoney Brook Estates | city | Maryland | United States | 39.07 | -77.08 | 347 | |
| Stoney Creek Estates | city | Maryland | United States | 39.06 | -77.26 | 282 | |
| Stoney Creek Farm | city | Maryland | United States | 39.06 | -77.26 | 249 | |
| Stoney Creek Farms | city | Maryland | United States | 39.39 | -77.47 | 377 | |
| Stoney Forest Estates | city | Maryland | United States | 39.51 | -76.24 | 282 | |
| Stoney Hill | city | Maryland | United States | 39.08 | -76.70 | 196 | |
| Stoney Ridge | city | Maryland | United States | 38.75 | -76.05 | 49 | |
| Stoney Ridge | city | Maryland | United States | 39.47 | -77.07 | 830 | |
| Stoney Run | city | Maryland | United States | 38.22 | -76.49 | 82 | |
| Stoney View | city | Maryland | United States | 39.15 | -76.53 | 49 | |
| Stoneybrook | city | Maryland | United States | 39.49 | -76.39 | 390 | |
| Stoneybrook North | city | Maryland | United States | 39.38 | -76.78 | 830 | |
| Stoneybrook Village | city | Maryland | United States | 39.15 | -76.53 | 49 | |
| Stonington | city | Maryland | United States | 39.06 | -76.47 | 98 | |
| Stony Beach | city | Maryland | United States | 39.17 | -76.52 | 3 | |
| Stony Chase Court | city | Maryland | United States | 39.65 | -75.94 | 200 | |
| Stony Run | city | Maryland | United States | 39.18 | -76.70 | 98 | |
| Stouter | city | Maryland | United States | 39.72 | -77.35 | 830 | |
| Stovers | city | Maryland | United States | 39.52 | -77.32 | 347 | |
| Stratford | city | Maryland | United States | 39.45 | -76.62 | 393 | |
| Strathmore | city | Maryland | United States | 39.52 | -76.43 | 830 | |
| Stratton Woods | city | Maryland | United States | 39.02 | -77.13 | 341 | |
| Strawberry Hills | city | Maryland | United States | 39.13 | -76.73 | 177 | |
| Strawberry Hills Estates | city | Maryland | United States | 38.65 | -77.07 | 131 | |
| Strawbridge Estates | city | Maryland | United States | 39.42 | -76.95 | 830 | |
| Strawleigh | city | Maryland | United States | 39.40 | -77.51 | 830 | |
| Strawn | city | Maryland | United States | 39.72 | -79.30 | 2509 | |
| Streamwood | city | Maryland | United States | 39.41 | -77.02 | 830 | |
| Strecker | city | Maryland | United States | 39.48 | -79.19 | 2542 | |
| Street | city | Maryland | United States | 39.67 | -76.38 | 830 | |
| Stringtown | city | Maryland | United States | 39.55 | -76.72 | 830 | |
| Stronghold | city | Maryland | United States | 39.25 | -77.39 | 830 | |
| Stull | city | Maryland | United States | 39.56 | -77.30 | 830 | |
| Stumptown | city | Maryland | United States | 39.65 | -77.14 | 830 | |
| Sturbridge | city | Maryland | United States | 39.49 | -76.52 | 830 | |
| Sturbridge | city | Maryland | United States | 39.02 | -76.49 | 95 | |
| Sturgill | city | Maryland | United States | 39.66 | -76.25 | 351 |