Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Broad Run | Stream | | Montgomery | 39 06 49 N | 077 29 10 W |
| Broad Run Aqueduct | Bridge | 59 | Montgomery | 39 06 59 N | 077 29 04 W |
| Broadwood Manor | Populated Place | 115 | Montgomery | 39 04 43 N | 077 07 08 W |
| Brook Hollow | Populated Place | 170 | Montgomery | 39 13 25 N | 077 07 59 W |
| Brook Manor Park | Park | 152 | Montgomery | 39 07 33 N | 077 04 12 W |
| Brookdale | Populated Place | 90 | Montgomery | 38 57 33 N | 077 05 30 W |
| Brooke Grove | Populated Place | 177 | Montgomery | 39 11 58 N | 077 08 27 W |
| Brooke Grove Elementary School | School | 135 | Montgomery | 39 09 26 N | 077 03 02 W |
| Brooke Grove Health Center | Building | 145 | Montgomery | 39 09 23 N | 077 02 29 W |
| Brooke Manor Country Club | Locale | 160 | Montgomery | 39 07 27 N | 077 04 36 W |
| Brookemanor Estates | Populated Place | 128 | Montgomery | 39 08 02 N | 077 05 28 W |
| Brookeville | Populated Place | 133 | Montgomery | 39 10 50 N | 077 03 33 W |
| Brookeville Heights | Populated Place | 138 | Montgomery | 39 12 07 N | 077 04 14 W |
| Brookeville Knolls | Populated Place | 153 | Montgomery | 39 09 46 N | 077 04 08 W |
| Brookeville Post Office | Post Office | 131 | Montgomery | 39 10 50 N | 077 03 30 W |
| Brookgrove Schools (historical) | School | 169 | Montgomery | 39 12 35 N | 077 09 24 W |
| Brookhaven Elementary School | School | 121 | Montgomery | 39 04 56 N | 077 05 31 W |
| Brookmead | Populated Place | 117 | Montgomery | 39 07 02 N | 077 18 06 W |
| Brookmead North | Populated Place | 114 | Montgomery | 39 07 11 N | 077 18 01 W |
| Brookmont | Populated Place | 37 | Montgomery | 38 56 31 N | 077 07 13 W |
| Brooks Park | Park | 114 | Montgomery | 39 08 35 N | 077 24 17 W |
| Brookside Botanical Gardens | Park | 102 | Montgomery | 39 03 31 N | 077 02 13 W |
| Brookside Forest | Populated Place | 94 | Montgomery | 39 00 26 N | 077 00 17 W |
| Brookview School | School | 96 | Montgomery | 39 01 04 N | 076 59 20 W |
| Broome Junior High School | School | 101 | Montgomery | 39 04 57 N | 077 06 50 W |
| Brown | Populated Place | 135 | Montgomery | 39 08 45 N | 077 13 04 W |
| Brown Station Elementary School | School | 130 | Montgomery | 39 08 19 N | 077 13 50 W |
| Browningsville | Populated Place | 155 | Montgomery | 39 18 26 N | 077 14 35 W |
| Browns Corner | Populated Place | 126 | Montgomery | 39 06 35 N | 077 18 10 W |
| Browns Corner | Populated Place | 68 | Montgomery | 38 59 38 N | 076 59 34 W |
| Browns Corner | Populated Place | 159 | Montgomery | 39 07 20 N | 076 59 20 W |
| Browns Station Park | Park | 128 | Montgomery | 39 08 55 N | 077 13 14 W |
| Brownstown | Populated Place | 105 | Montgomery | 39 08 28 N | 077 17 40 W |
| Brownstown Estates | Populated Place | 111 | Montgomery | 39 08 26 N | 077 17 08 W |
| Buck Branch | Stream | | Montgomery | 39 01 01 N | 077 10 12 W |
| Buck Branch Park | Park | 92 | Montgomery | 39 01 46 N | 077 10 30 W |
| Buckhorn Branch | Stream | | Montgomery | 39 06 08 N | 077 02 11 W |
| Bucklodge | Populated Place | 134 | Montgomery | 39 11 33 N | 077 20 07 W |
| Bucklodge Branch | Stream | | Montgomery | 39 08 36 N | 077 20 21 W |
| Bucklodge Station | Locale | 134 | Montgomery | 39 11 33 N | 077 20 07 W |
| Bullards Park | Park | 124 | Montgomery | 39 04 58 N | 077 10 01 W |
| Bullis School | School | 101 | Montgomery | 38 59 44 N | 077 01 11 W |
| Bullis School | School | 126 | Montgomery | 39 01 42 N | 077 12 00 W |
| Bulls Run | Stream | | Montgomery | 38 59 50 N | 077 08 01 W |
| Burdette | Populated Place | 150 | Montgomery | 39 11 58 N | 077 18 18 W |
| Burnham Hills | Populated Place | 180 | Montgomery | 39 11 54 N | 077 08 52 W |
| Burnham Woods | Populated Place | 164 | Montgomery | 39 12 30 N | 077 09 43 W |
| Burning Tree Country Club | Locale | 80 | Montgomery | 39 00 03 N | 077 09 01 W |
| Burning Tree Elementary School | School | 73 | Montgomery | 38 59 24 N | 077 08 36 W |
| Burning Tree Estates | Populated Place | 75 | Montgomery | 39 00 28 N | 077 09 21 W |
| Burnt Mills | Populated Place | 92 | Montgomery | 39 02 01 N | 077 00 16 W |
| Burnt Mills Elementary School | School | 105 | Montgomery | 39 02 21 N | 077 00 07 W |
| Burnt Mills Hills | Populated Place | 95 | Montgomery | 39 01 58 N | 076 59 39 W |
| Burnt Mills Knolls | Populated Place | 113 | Montgomery | 39 01 53 N | 076 59 16 W |
| Burnt Mills Manor | Populated Place | 88 | Montgomery | 39 02 08 N | 077 00 16 W |
| Burnt Mills Reservoir | Reservoir | 69 | Montgomery | 39 01 51 N | 077 00 24 W |
| Burnt Mills Village | Populated Place | 102 | Montgomery | 39 02 16 N | 077 00 18 W |
| Burtonsville | Populated Place | 149 | Montgomery | 39 06 40 N | 076 55 57 W |
| Burtonsville Baptist Church | Church | 145 | Montgomery | 39 06 25 N | 076 56 31 W |
| Burtonsville Commerce Center | Locale | 136 | Montgomery | 39 06 33 N | 076 55 41 W |
| Burtonsville Crossing Shopping Center | Locale | 150 | Montgomery | 39 06 42 N | 076 56 03 W |
| Burtonsville Elementary School | School | 150 | Montgomery | 39 06 41 N | 076 56 11 W |
| Burtonsville Lookout Tower | Tower | 150 | Montgomery | 39 07 17 N | 076 55 38 W |
| Burtonsville Park | Park | 143 | Montgomery | 39 06 57 N | 076 57 19 W |
| Burtonsville Post Office | Post Office | 147 | Montgomery | 39 06 25 N | 076 56 19 W |
| Burtonsville Volunteer Fire Department Fire Station 15 | Building | | Montgomery | 39 08 51 N | 077 35 13 W |
| Bushey Drive School | School | 109 | Montgomery | 39 03 22 N | 077 04 44 W |
| Byeforde | Populated Place | 83 | Montgomery | 39 00 41 N | 077 05 03 W |
| Cabin Branch | Stream | | Montgomery | 39 05 20 N | 077 27 46 W |
| Cabin Branch | Stream | | Montgomery | 39 10 41 N | 077 13 17 W |
| Cabin Branch | Stream | | Montgomery | 39 11 26 N | 077 18 04 W |
| Cabin Branch Park | Park | 127 | Montgomery | 39 10 25 N | 077 11 06 W |
| Cabin John | Populated Place | 52 | Montgomery | 38 58 31 N | 077 09 29 W |
| Cabin John Bridge | Bridge | 21 | Montgomery | 38 58 22 N | 077 08 55 W |
| Cabin John Creek | Stream | | Montgomery | 38 58 11 N | 077 08 47 W |
| Cabin John Creek Stream Valley Park | Park | 65 | Montgomery | 39 00 02 N | 077 10 11 W |
| Cabin John Fire Station Company 10 | Building | 48 | Montgomery | 38 59 34 N | 077 09 41 W |
| Cabin John Fire Station Company 30 | Building | 104 | Montgomery | 39 00 35 N | 077 13 13 W |
| Cabin John Island | Island | 17 | Montgomery | 38 58 00 N | 077 08 37 W |
| Cabin John Middle School | School | 96 | Montgomery | 39 01 53 N | 077 10 20 W |
| Cabin John Park | Populated Place | 54 | Montgomery | 38 58 35 N | 077 09 54 W |
| Cabin John Post Office | Post Office | 48 | Montgomery | 38 58 29 N | 077 09 43 W |
| Cabin John Regional Park | Park | 96 | Montgomery | 39 02 02 N | 077 08 56 W |
| Cabin John United Methodist Church | Church | 47 | Montgomery | 38 58 26 N | 077 09 32 W |
| Caithness Shelter School | School | 153 | Montgomery | 39 06 34 N | 077 04 32 W |
| Calico Rapids | Rapids | 16 | Montgomery | 38 58 25 N | 077 12 34 W |
| Calvary Apostolic Church | Church | 139 | Montgomery | 39 08 08 N | 077 12 06 W |
| Calvary Lutheran Church | Church | 110 | Montgomery | 39 00 42 N | 077 02 28 W |
| Calverton Baptist Church | Church | 107 | Montgomery | 39 03 54 N | 076 56 39 W |
| Calvin Park | Park | 108 | Montgomery | 39 04 57 N | 077 07 30 W |
| Camelback Village | Populated Place | 166 | Montgomery | 39 09 01 N | 077 03 54 W |
| Campbell Corner | Populated Place | 86 | Montgomery | 39 00 07 N | 077 10 50 W |
| Candlewood Elementary School | School | 136 | Montgomery | 39 07 44 N | 077 08 50 W |
| Cannon Road Elementary School | School | 111 | Montgomery | 39 04 07 N | 076 59 39 W |
| Capital View Park | Park | 92 | Montgomery | 39 01 14 N | 077 03 18 W |
| Capitol View Park | Populated Place | 119 | Montgomery | 39 01 20 N | 077 03 38 W |
| Captain James E Daly Elementary School | School | 130 | Montgomery | 39 11 18 N | 077 13 59 W |
| Captain John Church (historical) | Church | 122 | Montgomery | 39 01 35 N | 077 12 20 W |
| Carderock | Populated Place | 45 | Montgomery | 38 58 39 N | 077 11 40 W |
| Carderock Park | Park | 44 | Montgomery | 38 58 38 N | 077 09 58 W |
| Carderock Springs | Populated Place | 76 | Montgomery | 38 59 20 N | 077 10 03 W |
| Carderock Springs Elementary School | School | 79 | Montgomery | 38 58 59 N | 077 10 18 W |
| Carl Sandburg Learning Center School | School | 96 | Montgomery | 39 04 34 N | 077 06 37 W |
| Carole Acres | Populated Place | 113 | Montgomery | 39 04 11 N | 076 59 44 W |
| Carroll Branch | Stream | | Montgomery | 39 00 06 N | 077 14 50 W |
| Carroll Knolls | Populated Place | 110 | Montgomery | 39 01 25 N | 077 02 59 W |
| Carroll Manor | Populated Place | 80 | Montgomery | 38 58 49 N | 077 00 16 W |
| Casey Community Center | Building | 150 | Montgomery | 39 07 26 N | 077 10 54 W |
| Cashell Elementary School | School | 139 | Montgomery | 39 08 14 N | 077 05 08 W |
| Cashell Manor | Populated Place | 128 | Montgomery | 39 08 35 N | 077 05 15 W |