Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Colonel Zadok Magruder High School | School | 132 | Montgomery | 39 07 53 N | 077 07 06 W |
| Colonial Shopping Center | Locale | 107 | Montgomery | 39 03 27 N | 077 04 58 W |
| Colter Industrial Park | Locale | 123 | Montgomery | 39 06 07 N | 077 08 34 W |
| Columbia Church | Church | 153 | Montgomery | 39 07 01 N | 076 56 00 W |
| Columbia Country Club | Locale | 89 | Montgomery | 38 59 21 N | 077 04 42 W |
| Columbia Forest | Populated Place | 97 | Montgomery | 38 59 24 N | 077 05 09 W |
| Columbia Park | Park | 138 | Montgomery | 39 06 08 N | 076 56 39 W |
| Columbia Union College | School | 67 | Montgomery | 38 59 05 N | 076 59 58 W |
| Community Church | Church | 97 | Montgomery | 39 04 59 N | 077 19 31 W |
| Comus | Populated Place | 181 | Montgomery | 39 14 49 N | 077 21 00 W |
| Comus Sugarloaf | Populated Place | 144 | Montgomery | 39 15 20 N | 077 22 14 W |
| Concord Church | Church | 66 | Montgomery | 38 59 11 N | 077 08 44 W |
| Congregation Har Shalom Synagogue | Church | 123 | Montgomery | 39 02 40 N | 077 11 36 W |
| Congressional Airport (historical) | Airport | 110 | Montgomery | 39 03 27 N | 077 07 39 W |
| Congressional Country Club | Locale | 84 | Montgomery | 38 59 46 N | 077 10 36 W |
| Congressional Elementary School (historical) | School | 109 | Montgomery | 39 03 25 N | 077 07 39 W |
| Congressional Heights Baptist Church | Church | 116 | Montgomery | 39 03 06 N | 077 09 49 W |
| Congressional Manor | Populated Place | 85 | Montgomery | 38 59 50 N | 077 10 22 W |
| Congressional Shopping Plaza | Locale | 114 | Montgomery | 39 03 42 N | 077 07 37 W |
| Conn Island | Island | 47 | Montgomery | 39 00 30 N | 077 14 57 W |
| Connecticut Avenue Estates | Populated Place | 99 | Montgomery | 39 03 14 N | 077 04 07 W |
| Connecticut Avenue Hills | Populated Place | 97 | Montgomery | 39 02 48 N | 077 04 47 W |
| Connecticut Avenue Park | Park | 95 | Montgomery | 39 02 38 N | 077 04 36 W |
| Connecticut Avenue Park | Populated Place | 109 | Montgomery | 39 03 45 N | 077 04 40 W |
| Connecticut Gardens | Populated Place | 103 | Montgomery | 39 02 52 N | 077 04 22 W |
| Connecticut Park Elementary School (historical) | School | 111 | Montgomery | 39 03 42 N | 077 04 44 W |
| Connelly School of the Holy Child | School | 91 | Montgomery | 38 59 58 N | 077 11 15 W |
| Cool Spring Branch | Stream | | Montgomery | 39 00 45 N | 077 14 34 W |
| Coquelin Run | Stream | | Montgomery | 38 59 41 N | 077 03 45 W |
| County Service Park | Park | 155 | Montgomery | 39 07 41 N | 077 10 01 W |
| County View | Populated Place | 236 | Montgomery | 39 16 05 N | 077 12 28 W |
| Courthouse Station Post Office | Post Office | 138 | Montgomery | 39 05 02 N | 077 09 12 W |
| Covenant Orthodox Presbyterian Church | Church | 138 | Montgomery | 39 06 20 N | 076 55 05 W |
| Coventry (subdivision) | Populated Place | 133 | Montgomery | 39 07 52 N | 077 14 14 W |
| Crabbs Branch | Stream | | Montgomery | 39 06 46 N | 077 07 48 W |
| Crabbs Branch Park | Park | 121 | Montgomery | 39 07 01 N | 077 08 59 W |
| Cresthaven | Populated Place | 88 | Montgomery | 39 01 30 N | 076 59 28 W |
| Cresthaven Elementary School | School | 114 | Montgomery | 39 01 39 N | 076 59 15 W |
| Crestview | Populated Place | 85 | Montgomery | 38 57 10 N | 077 05 59 W |
| Crooke Emergency Communications Center | Building | 132 | Montgomery | 39 04 55 N | 077 09 03 W |
| Cropley | Populated Place | 46 | Montgomery | 38 58 48 N | 077 13 12 W |
| Crown Pointe Corporate Center | Locale | 114 | Montgomery | 39 09 41 N | 077 13 36 W |
| Croydon Park | Populated Place | 130 | Montgomery | 39 05 13 N | 077 08 36 W |
| Dalecarlia Reservoir | Reservoir | 44 | Montgomery | 38 56 22 N | 077 06 39 W |
| Damascus | Populated Place | 264 | Montgomery | 39 17 18 N | 077 12 14 W |
| Damascus Church of God | Church | 227 | Montgomery | 39 19 48 N | 077 11 28 W |
| Damascus Elementary School | School | 264 | Montgomery | 39 17 07 N | 077 12 39 W |
| Damascus Gardens | Populated Place | 240 | Montgomery | 39 16 56 N | 077 12 14 W |
| Damascus High School | School | 256 | Montgomery | 39 16 55 N | 077 12 37 W |
| Damascus Hill | Populated Place | 208 | Montgomery | 39 15 40 N | 077 12 05 W |
| Damascus Library | Building | 259 | Montgomery | 39 17 14 N | 077 12 01 W |
| Damascus Manor | Populated Place | 245 | Montgomery | 39 16 47 N | 077 12 40 W |
| Damascus Park | Park | 243 | Montgomery | 39 17 17 N | 077 12 29 W |
| Damascus Post Office | Post Office | 260 | Montgomery | 39 17 15 N | 077 12 13 W |
| Damascus Seventh Day Adventist Church | Church | 262 | Montgomery | 39 17 11 N | 077 11 55 W |
| Damascus Shopping Center | Locale | 251 | Montgomery | 39 17 22 N | 077 12 09 W |
| Damascus Terrace | Populated Place | 242 | Montgomery | 39 16 56 N | 077 12 01 W |
| Damascus United Methodist Church | Church | 261 | Montgomery | 39 17 05 N | 077 12 01 W |
| Damascus Valley Estates | Populated Place | 236 | Montgomery | 39 17 10 N | 077 10 57 W |
| Damascus Valley Park | Populated Place | 234 | Montgomery | 39 16 43 N | 077 12 18 W |
| Damascus View | Populated Place | 248 | Montgomery | 39 16 45 N | 077 12 49 W |
| Damascus Volunteer Fire Department Fire Station 13 | Building | | Montgomery | 39 29 27 N | 077 20 48 W |
| Damascus Wesleyan Church | Church | 236 | Montgomery | 39 16 34 N | 077 12 15 W |
| Danac Technical Industrial Park | Locale | 151 | Montgomery | 39 06 50 N | 077 11 04 W |
| Dark Branch | Stream | | Montgomery | 39 16 34 N | 077 18 27 W |
| Darnestown | Populated Place | 125 | Montgomery | 39 06 12 N | 077 17 27 W |
| Darnestown Elementary School | School | 129 | Montgomery | 39 06 08 N | 077 17 06 W |
| Darnestown Hills | Populated Place | 105 | Montgomery | 39 05 45 N | 077 16 39 W |
| Darnestown Knolls | Populated Place | 120 | Montgomery | 39 05 57 N | 077 17 29 W |
| Darnestown United Presbyterian Cemetery | Cemetery | 133 | Montgomery | 39 06 04 N | 077 17 09 W |
| Darnestown United Presbyterian Church | Church | 125 | Montgomery | 39 06 11 N | 077 17 10 W |
| David Scul Park | Park | 122 | Montgomery | 39 05 40 N | 077 08 00 W |
| David Taylor Model Basin | Basin | 39 | Montgomery | 38 58 26 N | 077 11 29 W |
| Davis Airport | Airport | 191 | Montgomery | 39 14 40 N | 077 08 55 W |
| Davis Library | Building | 113 | Montgomery | 39 01 23 N | 077 07 43 W |
| Dawson Park | Park | 121 | Montgomery | 39 04 28 N | 077 08 34 W |
| Dawsonville | Populated Place | 94 | Montgomery | 39 07 42 N | 077 20 35 W |
| Dawsonville Mennonite Church | Church | 98 | Montgomery | 39 07 38 N | 077 20 41 W |
| Dawsonville Regional Park | Park | 75 | Montgomery | 39 08 53 N | 077 20 12 W |
| Dayspring Creek | Stream | | Montgomery | 39 11 34 N | 077 12 43 W |
| Deakins Range | Populated Place | 107 | Montgomery | 39 04 47 N | 077 18 06 W |
| Deer Park | Populated Place | 111 | Montgomery | 39 04 03 N | 076 57 01 W |
| Deerfield | Populated Place | 78 | Montgomery | 39 00 54 N | 077 09 49 W |
| Dellabrooke Estates | Populated Place | 124 | Montgomery | 39 10 30 N | 077 02 24 W |
| Denit Estates | Populated Place | 143 | Montgomery | 39 12 19 N | 077 01 33 W |
| Dennis Avenue Elementary School (historical) | School | 110 | Montgomery | 39 01 29 N | 077 02 34 W |
| Department of Health and Human Services | Building | 110 | Montgomery | 39 03 44 N | 077 06 46 W |
| Derwood | Populated Place | 143 | Montgomery | 39 07 02 N | 077 09 40 W |
| Derwood Alliance Church | Church | 127 | Montgomery | 39 07 36 N | 077 09 00 W |
| Derwood Bible Church | Church | 141 | Montgomery | 39 07 07 N | 077 09 34 W |
| Derwood Experimental Laboratory | Building | 144 | Montgomery | 39 07 15 N | 077 09 12 W |
| Derwood Industrial Park | Locale | 130 | Montgomery | 39 06 15 N | 077 09 09 W |
| Derwood Post Office | Post Office | 150 | Montgomery | 39 08 42 N | 077 08 39 W |
| Diamond Elementary School | School | 125 | Montgomery | 39 08 08 N | 077 14 21 W |
| Diamond Farm Park | Park | 119 | Montgomery | 39 08 11 N | 077 13 53 W |
| Diamond Farms (subdivision) | Populated Place | 128 | Montgomery | 39 08 05 N | 077 13 32 W |
| Diamond Farms Post Office | Post Office | 121 | Montgomery | 39 08 06 N | 077 08 35 W |
| Diamond Square Shopping Center | Locale | 128 | Montgomery | 39 08 37 N | 077 13 11 W |
| Diamond View | Populated Place | 220 | Montgomery | 39 17 17 N | 077 13 14 W |
| Dickerson | Populated Place | 106 | Montgomery | 39 13 12 N | 077 25 27 W |
| Dickerson Conservation Park | Park | 90 | Montgomery | 39 11 53 N | 077 27 46 W |
| Dickerson Post Office | Post Office | 104 | Montgomery | 39 13 08 N | 077 25 28 W |
| Dickerson Recreation Center | Park | 101 | Montgomery | 39 13 03 N | 077 25 18 W |
| Dickerson United Methodist Church | Church | 100 | Montgomery | 39 13 06 N | 077 25 36 W |
| Dicovery Industrial Park | Locale | 134 | Montgomery | 39 05 20 N | 077 12 00 W |
| Dierssen Waterfowl Sanctuary | Park | 53 | Montgomery | 39 03 31 N | 077 18 13 W |
| District 1 (Laytonsville) Election District | Civil | 177 | Montgomery | 39 12 47 N | 077 08 18 W |
| District 10 (Potomac) Election District | Civil | 112 | Montgomery | 39 00 54 N | 077 12 07 W |
| District 11 (Barnesville) Election District | Civil | 157 | Montgomery | 39 12 21 N | 077 22 03 W |
| District 12 (Damascus) Election District | Civil | 241 | Montgomery | 39 17 04 N | 077 12 22 W |