| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Slabtown | city | Maryland | United States | 39.35 | -77.60 | 830 | |
| Slabtown | city | Maryland | United States | 39.68 | -78.89 | 1669 | |
| Slacks Corner | city | Maryland | United States | 39.32 | -76.95 | 830 | |
| Sleepy Hollow | city | Maryland | United States | 38.65 | -76.62 | 98 | |
| Sleepy Hollow Estates | city | Maryland | United States | 39.37 | -77.31 | 830 | |
| Sleepy Hollow Mobile Home Park | city | Maryland | United States | 39.36 | -76.44 | 49 | |
| Slidell | city | Maryland | United States | 39.22 | -77.33 | 830 | |
| Sligo | city | Maryland | United States | 39.00 | -77.03 | 314 | |
| Sligo Park Hills | city | Maryland | United States | 38.99 | -77.01 | 154 | |
| Sligo Woods | city | Maryland | United States | 39.03 | -77.03 | 341 |