Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Beach School | School | 20 | Calvert | 38 41 00 N | 076 32 15 W |
| Bell Haven | Populated Place | 30 | Calvert | 38 36 26 N | 076 34 59 W |
| Bellcar | Populated Place | 2 | Calvert | 38 36 28 N | 076 30 49 W |
| Ben Creek | Stream | | Calvert | 38 25 44 N | 076 34 47 W |
| Bertha | Populated Place | 35 | Calvert | 38 23 26 N | 076 25 59 W |
| Bess-Mar Estates | Populated Place | 34 | Calvert | 38 36 14 N | 076 34 31 W |
| Bethel Way of the Cross Church | Church | 36 | Calvert | 38 38 37 N | 076 37 13 W |
| Beverly Knolls | Populated Place | 36 | Calvert | 38 36 15 N | 076 36 27 W |
| Bible Way Church | Church | 42 | Calvert | 38 29 54 N | 076 34 49 W |
| Biglanes Choice | Populated Place | 32 | Calvert | 38 35 59 N | 076 33 59 W |
| Blue Dolphin Estates | Populated Place | 43 | Calvert | 38 28 00 N | 076 33 35 W |
| Blunts Cove | Bay | 5 | Calvert | 38 22 04 N | 076 28 41 W |
| Bobcat Brook | Stream | | Calvert | 38 26 19 N | 076 35 39 W |
| Botelars Landing (historical) | Locale | 0 | Calvert | 38 25 21 N | 076 34 01 W |
| Bow Cove | Bay | 7 | Calvert | 38 19 45 N | 076 26 56 W |
| Bowen Country | Populated Place | 29 | Calvert | 38 35 07 N | 076 37 03 W |
| Bowens | Populated Place | 43 | Calvert | 38 29 43 N | 076 37 20 W |
| Bowens Farm Pond Dam | Dam | 21 | Calvert | 38 30 18 N | 076 36 53 W |
| Boyds Farm | Locale | 44 | Calvert | 38 29 25 N | 076 34 27 W |
| Breedens Point | Cape | 3 | Calvert | 38 24 24 N | 076 28 60 W |
| Breezy Knoll Estates | Populated Place | 37 | Calvert | 38 39 38 N | 076 38 06 W |
| Breezy Point | Populated Place | 5 | Calvert | 38 37 19 N | 076 30 57 W |
| Brianwood | Populated Place | 36 | Calvert | 38 22 32 N | 076 24 24 W |
| Briarwood | Populated Place | 29 | Calvert | 38 39 30 N | 076 38 09 W |
| Brick Landing | Locale | 9 | Calvert | 38 21 40 N | 076 23 14 W |
| Bright Acres Mobile Home Park | Populated Place | 37 | Calvert | 38 41 23 N | 076 38 22 W |
| Brighton Woods | Populated Place | 49 | Calvert | 38 39 02 N | 076 36 12 W |
| Briscoe | Populated Place | 7 | Calvert | 38 25 25 N | 076 33 51 W |
| Brooks Administrative and Instructional Center | School | 44 | Calvert | 38 33 07 N | 076 34 20 W |
| Brooks Cemetery | Cemetery | 44 | Calvert | 38 27 34 N | 076 32 27 W |
| Brooks Church | Church | 47 | Calvert | 38 27 35 N | 076 32 24 W |
| Brooks Cove | Bay | 9 | Calvert | 38 20 28 N | 076 26 03 W |
| Brooks High School | School | 42 | Calvert | 38 33 07 N | 076 34 15 W |
| Brookside | Populated Place | 45 | Calvert | 38 39 53 N | 076 32 33 W |
| Broomes Island | Island | 0 | Calvert | 38 24 25 N | 076 33 05 W |
| Broomes Island | Populated Place | 2 | Calvert | 38 25 05 N | 076 32 39 W |
| Broomes Island Post Office | Post Office | 4 | Calvert | 38 25 19 N | 076 32 46 W |
| Brooms Island | Island | -2 | Calvert | 38 25 23 N | 076 29 28 W |
| Brown Creek | Stream | | Calvert | 38 20 41 N | 076 25 33 W |
| Brown United Methodist Church | Church | 39 | Calvert | 38 31 25 N | 076 31 59 W |
| Brownies Creek | Stream | | Calvert | 38 40 47 N | 076 31 56 W |
| Buckler Trailer Park | Populated Place | 30 | Calvert | 38 33 47 N | 076 36 23 W |
| Buena Vista | Populated Place | 6 | Calvert | 38 31 40 N | 076 39 06 W |
| Buena Vista Hills | Populated Place | 44 | Calvert | 38 31 43 N | 076 37 16 W |
| Buena Vista on the Patuxent | Populated Place | 8 | Calvert | 38 31 37 N | 076 38 59 W |
| Buenavista Post Office (historical) | Post Office | 6 | Calvert | 38 31 40 N | 076 39 06 W |
| Burch | Populated Place | 3 | Calvert | 38 30 33 N | 076 39 44 W |
| Burnt Oak (subdivision) | Populated Place | 1 | Calvert | 38 42 43 N | 076 32 09 W |
| Burrell Branch | Stream | | Calvert | 38 21 39 N | 076 25 20 W |
| Buzzard Island | Island | -3 | Calvert | 38 29 32 N | 076 39 11 W |
| Buzzard Island Creek | Stream | | Calvert | 38 29 43 N | 076 39 16 W |
| Cabin Branch | Stream | | Calvert | 38 45 52 N | 076 39 12 W |
| Calams Run | Stream | | Calvert | 38 21 05 N | 076 23 43 W |
| Calvary Bible Church | Church | 33 | Calvert | 38 25 37 N | 076 27 45 W |
| Calvary Cemetery | Cemetery | 50 | Calvert | 38 37 01 N | 076 37 21 W |
| Calvary Church | Church | 51 | Calvert | 38 37 02 N | 076 37 21 W |
| Calvary United Apostolic Church | Church | 38 | Calvert | 38 41 01 N | 076 36 00 W |
| Calvert Advanced Life Support Company 10 | Building | | Calvert | 38 56 17 N | 077 00 32 W |
| Calvert Beach | Populated Place | 14 | Calvert | 38 27 57 N | 076 28 38 W |
| Calvert Beach Estates | Populated Place | 28 | Calvert | 38 27 43 N | 076 29 00 W |
| Calvert Beach Park | Populated Place | 31 | Calvert | 38 28 19 N | 076 29 39 W |
| Calvert Beach Run | Stream | | Calvert | 38 27 50 N | 076 28 15 W |
| Calvert Career Center | School | 43 | Calvert | 38 33 23 N | 076 35 03 W |
| Calvert Chase | Populated Place | 31 | Calvert | 38 44 42 N | 076 40 12 W |
| Calvert Cliffs | Cliff | 6 | Calvert | 38 31 30 N | 076 30 51 W |
| Calvert Cliffs Nuclear Powerplant | Locale | 38 | Calvert | 38 26 05 N | 076 26 30 W |
| Calvert Cliffs State Park | Park | 34 | Calvert | 38 24 10 N | 076 25 19 W |
| Calvert Community College | School | 42 | Calvert | 38 33 15 N | 076 34 55 W |
| Calvert County | Civil | 41 | Calvert | 38 33 00 N | 076 34 59 W |
| Calvert County Courthouse | Building | 43 | Calvert | 38 32 18 N | 076 35 03 W |
| Calvert County Fairgrounds | Park | 42 | Calvert | 38 32 52 N | 076 34 53 W |
| Calvert County Fire/Rescue/Emergency Medical Services Division | Building | | Calvert | 38 54 32 N | 076 58 32 W |
| Calvert County Health Services Center | Hospital | 42 | Calvert | 38 33 28 N | 076 35 51 W |
| Calvert County Historical Society | Building | 45 | Calvert | 38 32 12 N | 076 35 08 W |
| Calvert County Industrial Park | Locale | 8 | Calvert | 38 30 40 N | 076 38 34 W |
| Calvert County Jail | Building | 43 | Calvert | 38 32 12 N | 076 36 55 W |
| Calvert County Landfill | Locale | 28 | Calvert | 38 32 20 N | 076 37 09 W |
| Calvert County Nursing Center | Hospital | 35 | Calvert | 38 33 29 N | 076 35 46 W |
| Calvert County Public Library | Building | 45 | Calvert | 38 32 10 N | 076 35 09 W |
| Calvert County Sheriff's Office | Building | | Calvert | 38 54 21 N | 076 59 12 W |
| Calvert County Special Education Center | School | 43 | Calvert | 38 33 11 N | 076 34 21 W |
| Calvert Elementary School | School | 43 | Calvert | 38 33 11 N | 076 34 10 W |
| Calvert Estates | Populated Place | 31 | Calvert | 38 45 12 N | 076 39 40 W |
| Calvert Executive Plaza | Locale | 42 | Calvert | 38 32 24 N | 076 35 01 W |
| Calvert High School | School | 43 | Calvert | 38 33 15 N | 076 34 57 W |
| Calvert House | Building | 48 | Calvert | 38 32 19 N | 076 35 15 W |
| Calvert Manor | Populated Place | 39 | Calvert | 38 40 35 N | 076 37 58 W |
| Calvert Marine Museum | Building | 1 | Calvert | 38 19 52 N | 076 27 52 W |
| Calvert Memorial Hospital | Hospital | 43 | Calvert | 38 33 39 N | 076 35 48 W |
| Calvert Memorial Hospital Heliport | Airport | 43 | Calvert | 38 33 39 N | 076 35 48 W |
| Calvert Middle School | School | 43 | Calvert | 38 32 54 N | 076 35 24 W |
| Calvert Mobile Home Park | Populated Place | 6 | Calvert | 38 30 23 N | 076 38 41 W |
| Calvert Pines Senior Center | Building | 45 | Calvert | 38 32 40 N | 076 35 43 W |
| Calvert Towne | Populated Place | 48 | Calvert | 38 31 50 N | 076 34 34 W |
| Calvert Village Shopping Center | Locale | 43 | Calvert | 38 32 42 N | 076 35 27 W |
| Calvert Woods | Populated Place | 55 | Calvert | 38 41 07 N | 076 36 28 W |
| Calvert-Anne Arundel Business Park | Locale | 43 | Calvert | 38 42 18 N | 076 34 57 W |
| Calverton High School | School | 23 | Calvert | 38 35 20 N | 076 36 33 W |
| Camelback | Populated Place | 37 | Calvert | 38 39 57 N | 076 36 59 W |
| Camp Conoy | Locale | 17 | Calvert | 38 25 42 N | 076 26 07 W |
| Camp Roosevelt | Locale | 14 | Calvert | 38 38 37 N | 076 31 28 W |
| Caney Creek | Stream | | Calvert | 38 30 45 N | 076 39 43 W |
| Cape Leonard | Populated Place | 19 | Calvert | 38 24 07 N | 076 29 31 W |
| Carol Court | Populated Place | 25 | Calvert | 38 22 02 N | 076 26 19 W |
| Carpenter Beach | Populated Place | 6 | Calvert | 38 36 18 N | 076 30 52 W |
| Carriage Hills | Populated Place | 43 | Calvert | 38 38 08 N | 076 36 49 W |
| Carroll-Western United Methodist Church | Church | 46 | Calvert | 38 31 28 N | 076 37 04 W |
| Castlemore | Populated Place | 44 | Calvert | 38 39 24 N | 076 39 59 W |
| Cattertons Reach | Populated Place | 43 | Calvert | 38 42 30 N | 076 37 28 W |
| Cavalier Country | Populated Place | 46 | Calvert | 38 44 54 N | 076 37 49 W |