Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Dam Number 3 | Dam | 82 | Washington | 39 20 02 N | 077 45 04 W |
| Dam Number 4 | Dam | 97 | Washington | 39 29 40 N | 077 49 37 W |
| Dam Number 5 | Dam | 107 | Washington | 39 36 22 N | 077 55 22 W |
| Dargan | Populated Place | 165 | Washington | 39 22 38 N | 077 43 59 W |
| Dargan Bend | Cape | 89 | Washington | 39 22 47 N | 077 44 58 W |
| Dargan Bend Picnic Area | Locale | 81 | Washington | 39 21 50 N | 077 44 27 W |
| Dargan Quarry | Mine | 92 | Washington | 39 22 10 N | 077 44 35 W |
| Deer Lodge Mobile Home Park | Populated Place | 135 | Washington | 39 39 15 N | 077 49 54 W |
| Dellinger School (historical) | School | 128 | Washington | 39 31 52 N | 077 50 56 W |
| Dellinger Wide Water | Area | 97 | Washington | 39 31 12 N | 077 50 32 W |
| Devils Backbone | Summit | 156 | Washington | 39 32 52 N | 077 42 16 W |
| Devils Backbone County Park | Park | 118 | Washington | 39 32 21 N | 077 42 37 W |
| District 1 (Sharpsburg) Election District | Civil | 153 | Washington | 39 27 10 N | 077 44 37 W |
| District 10 (Funkstown) Election District | Civil | 153 | Washington | 39 35 27 N | 077 43 02 W |
| District 11 (Sandy Hook) Election District | Civil | 185 | Washington | 39 20 38 N | 077 42 17 W |
| District 12 (Fairplay) Election District | Civil | 147 | Washington | 39 31 51 N | 077 44 52 W |
| District 13 (Maugansville) Election District | Civil | 160 | Washington | 39 41 54 N | 077 46 59 W |
| District 14 (Ringgold) Election District | Civil | 257 | Washington | 39 42 03 N | 077 32 05 W |
| District 15 (Indian Spring) Election District | Civil | 148 | Washington | 39 39 54 N | 078 00 36 W |
| District 16 (Beaver Creek) Election District | Civil | 162 | Washington | 39 34 45 N | 077 37 47 W |
| District 17 (Hagerstown) Election District | Civil | 155 | Washington | 39 37 30 N | 077 42 18 W |
| District 18 (Chewsville) Election District | Civil | 179 | Washington | 39 38 26 N | 077 38 56 W |
| District 19 (Keedysville) Election District | Civil | 117 | Washington | 39 29 10 N | 077 42 02 W |
| District 2 (Williamsport) Election District | Civil | 138 | Washington | 39 36 00 N | 077 48 14 W |
| District 20 (Downsville) Election District | Civil | 124 | Washington | 39 32 07 N | 077 49 23 W |
| District 21 (Hagerstown) Election District | Civil | 176 | Washington | 39 39 31 N | 077 42 49 W |
| District 22 (Hagerstown) Election District | Civil | 164 | Washington | 39 38 35 N | 077 42 26 W |
| District 23 (Wilsons) Election District | Civil | 144 | Washington | 39 39 19 N | 077 51 19 W |
| District 24 (Cedar Lawn) Election District | Civil | 164 | Washington | 39 39 00 N | 077 46 36 W |
| District 25 (Hagerstown) Election District | Civil | 183 | Washington | 39 39 13 N | 077 43 47 W |
| District 26 (Halfway) Election District | Civil | 172 | Washington | 39 37 06 N | 077 46 05 W |
| District 27 (Fountain Head) Election District | Civil | 189 | Washington | 39 41 44 N | 077 42 34 W |
| District 3 (Hagerstown) Election District | Civil | 177 | Washington | 39 38 00 N | 077 44 06 W |
| District 4 (Clear Spring) Election District | Civil | 189 | Washington | 39 40 20 N | 077 55 18 W |
| District 5 (Hancock) Election District | Civil | 208 | Washington | 39 41 10 N | 078 14 22 W |
| District 6 (Boonsboro) Election District | Civil | 172 | Washington | 39 31 08 N | 077 39 24 W |
| District 7 (Smithsburg) Election District | Civil | 260 | Washington | 39 39 20 N | 077 33 46 W |
| District 8 (Rohrersville) Election District | Civil | 228 | Washington | 39 25 24 N | 077 39 49 W |
| District 9 (Leitersburg) Election District | Civil | 171 | Washington | 39 41 58 N | 077 38 22 W |
| Ditch Run | Stream | | Washington | 39 41 20 N | 078 08 00 W |
| Ditto Farms Regional Park | Park | 182 | Washington | 39 36 44 N | 077 39 48 W |
| Dog Creek | Stream | | Washington | 39 28 34 N | 077 41 14 W |
| Dogtown | Populated Place | 120 | Washington | 39 30 21 N | 077 45 55 W |
| Doub Meadow (subdivision) | Populated Place | 159 | Washington | 39 37 00 N | 077 43 44 W |
| Doubs Mill | Populated Place | 151 | Washington | 39 34 41 N | 077 39 15 W |
| Doubs Mill Historic District | Park | 146 | Washington | 39 34 44 N | 077 39 20 W |
| Doubs Woods Park | Park | 169 | Washington | 39 37 02 N | 077 44 12 W |
| Dovenbergers Mill (historical) | Locale | 97 | Washington | 39 29 39 N | 077 45 48 W |
| Downey Branch | Stream | | Washington | 39 31 49 N | 077 49 27 W |
| Downsville | Populated Place | 141 | Washington | 39 32 54 N | 077 48 06 W |
| Downsville Church of the Brethren | Church | 147 | Washington | 39 33 01 N | 077 47 59 W |
| Dry Run | Populated Place | 183 | Washington | 39 42 46 N | 077 52 52 W |
| Dry Run | Stream | | Washington | 39 42 24 N | 077 51 24 W |
| Duck Island | Island | 97 | Washington | 39 36 28 N | 077 50 41 W |
| Dunker Church | Church | 152 | Washington | 39 28 30 N | 077 44 47 W |
| Durburow Mill | Locale | 176 | Washington | 39 41 18 N | 077 35 29 W |
| E Russell Hicks Middle School | School | 171 | Washington | 39 36 53 N | 077 43 59 W |
| Eakles Mills | Populated Place | 129 | Washington | 39 28 05 N | 077 41 05 W |
| Early Industrial Park | Locale | 158 | Washington | 39 34 20 N | 077 43 29 W |
| East Woods (historical) | Woods | 146 | Washington | 39 28 52 N | 077 44 20 W |
| Ebenezer African Methodist Episcopal Church | Church | 176 | Washington | 39 38 47 N | 077 43 04 W |
| Ebenezer Cemetery | Cemetery | 177 | Washington | 39 38 47 N | 077 43 03 W |
| Edgemont | Populated Place | 296 | Washington | 39 40 41 N | 077 32 29 W |
| Edgemont Creek | Stream | | Washington | 39 39 49 N | 077 31 45 W |
| Edgemont Reservoir | Reservoir | 274 | Washington | 39 39 48 N | 077 32 58 W |
| Edgemont Reservoir | Reservoir | 327 | Washington | 39 39 42 N | 077 32 41 W |
| Edgewood Hill (subdivision) | Populated Place | 170 | Washington | 39 36 55 N | 077 41 24 W |
| El Rancho Mobile Home Park | Populated Place | 165 | Washington | 39 35 04 N | 077 40 29 W |
| Elbow Ridge | Ridge | 281 | Washington | 39 42 43 N | 078 04 30 W |
| Eldership Church of God | Church | 158 | Washington | 39 37 21 N | 077 43 27 W |
| Elgin School (historical) | School | 141 | Washington | 39 20 21 N | 077 41 45 W |
| Elim Full Gospel Church | Church | 164 | Washington | 39 37 50 N | 077 43 36 W |
| Elk Ridge | Ridge | 459 | Washington | 39 23 36 N | 077 41 09 W |
| Emma K Doub Elementary School | School | 166 | Washington | 39 37 01 N | 077 43 53 W |
| Emmanuel United Methodist Church | Church | 175 | Washington | 39 37 47 N | 077 43 54 W |
| Emmertsville | Populated Place | 147 | Washington | 39 32 14 N | 077 43 59 W |
| Ernstville | Populated Place | 127 | Washington | 39 37 58 N | 078 01 36 W |
| Evangelical Bible Church | Church | 160 | Washington | 39 37 27 N | 077 43 31 W |
| Exline | Populated Place | 269 | Washington | 39 40 16 N | 078 16 52 W |
| Fair Play Mill (historical) | Locale | 127 | Washington | 39 32 18 N | 077 45 40 W |
| Fairgreen Acres | Populated Place | 192 | Washington | 39 40 47 N | 077 42 46 W |
| Fairplay | Populated Place | 143 | Washington | 39 32 11 N | 077 44 51 W |
| Fairplay Farms | Populated Place | 141 | Washington | 39 32 05 N | 077 46 35 W |
| Fairplay Post Office | Post Office | 147 | Washington | 39 32 25 N | 077 44 19 W |
| Fairview | Populated Place | 164 | Washington | 39 42 13 N | 078 10 40 W |
| Fairview | Populated Place | 151 | Washington | 39 42 44 N | 077 50 35 W |
| Fairview Acres | Populated Place | 164 | Washington | 39 41 56 N | 077 47 56 W |
| Fairview Cemetery | Cemetery | 121 | Washington | 39 29 16 N | 077 42 04 W |
| Fairview Mill | Populated Place | 136 | Washington | 39 42 02 N | 077 49 49 W |
| Fairview Mountain | Summit | 505 | Washington | 39 39 21 N | 077 58 09 W |
| Fairview Outdoor Education Center | School | 193 | Washington | 39 39 52 N | 077 56 19 W |
| Faith School (historical) | School | 217 | Washington | 39 42 46 N | 077 54 08 W |
| Falling Waters Ferry (historical) | Crossing | 101 | Washington | 39 33 29 N | 077 53 14 W |
| Father Keedy Home for the Aged | Building | 166 | Washington | 39 32 57 N | 077 38 44 W |
| Ferry Hill | Summit | 135 | Washington | 39 26 19 N | 077 47 51 W |
| Ferry Hill Plantation | Locale | 132 | Washington | 39 26 18 N | 077 47 54 W |
| Fiddlesburg | Populated Place | 154 | Washington | 39 39 27 N | 077 41 19 W |
| Fiery Siding | Locale | 158 | Washington | 39 35 38 N | 077 43 26 W |
| Fire Station Number 2 | Building | 164 | Washington | 39 38 30 N | 077 43 27 W |
| Fire Station Number 3 | Building | 170 | Washington | 39 38 37 N | 077 43 10 W |
| Fire Station Number 4 | Building | 182 | Washington | 39 38 46 N | 077 43 45 W |
| First Baptist Church | Church | 183 | Washington | 39 38 46 N | 077 43 43 W |
| First Brethren Cemetery | Cemetery | 164 | Washington | 39 38 17 N | 077 43 06 W |
| First Brethren Church | Church | 164 | Washington | 39 38 18 N | 077 43 02 W |
| First Christian Church | Church | 170 | Washington | 39 39 30 N | 077 42 12 W |
| First Church of God | Church | 168 | Washington | 39 38 22 N | 077 43 34 W |
| First Church of God | Church | 128 | Washington | 39 27 29 N | 077 45 02 W |
| First Hose Company of Boonsboro Company 6 | Building | | Washington | 39 51 07 N | 078 05 09 W |
| First Presbyterian Church | Church | 174 | Washington | 39 38 37 N | 077 43 28 W |
| Flickersville | Populated Place | 244 | Washington | 39 27 01 N | 077 42 08 W |