Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Cat Cove | Bay | 4 | Dorchester | 38 17 29 N | 076 11 56 W |
| Cat Creek | Stream | | Baltimore | 39 24 21 N | 076 22 21 W |
| Cat Creek | Stream | | St. Mary's | 38 25 06 N | 076 37 11 W |
| Cat Pond | Lake | 64 | Charles | 38 36 44 N | 076 58 27 W |
| Cat Rock | Summit | 451 | Frederick | 39 36 59 N | 077 26 48 W |
| Catbird Creek | Stream | | Worcester | 38 14 51 N | 075 13 46 W |
| Catchpenny | Populated Place | 6 | Wicomico | 38 21 17 N | 075 43 26 W |
| Catelins Cove | Bay | 2 | Anne Arundel | 38 59 49 N | 076 27 31 W |
| Cathedral Cemetery | Cemetery | 83 | Baltimore (city) | 39 17 18 N | 076 41 01 W |
| Cathedral Hill Historic District | Park | 31 | Baltimore (city) | 39 17 38 N | 076 36 56 W |
| Cathedral of Mary Our Queen | Church | 126 | Baltimore (city) | 39 21 31 N | 076 37 34 W |
| Cathedral of the Annunciation Greek Orthodox Church | Church | 24 | Baltimore (city) | 39 18 17 N | 076 37 04 W |
| Cathedral of the Incarnation | Church | 77 | Baltimore (city) | 39 19 57 N | 076 36 60 W |
| Catherine T Reed Elementary School | School | 61 | Prince George's | 38 59 22 N | 076 50 31 W |
| Cathers Corner | Populated Place | 130 | Cecil | 39 39 09 N | 076 03 01 W |
| Catlin (historical) | Populated Place | 12 | Queen Anne's | 39 12 18 N | 076 00 14 W |
| Catoctin Acres | Populated Place | 313 | Frederick | 39 27 08 N | 077 30 07 W |
| Catoctin Creek | Stream | | Frederick | 39 18 29 N | 077 33 57 W |
| Catoctin Creek Aqueduct | Bridge | 61 | Frederick | 39 18 39 N | 077 34 07 W |
| Catoctin Furnace | Populated Place | 140 | Frederick | 39 34 45 N | 077 25 57 W |
| Catoctin Furnace Historic District | Park | 144 | Frederick | 39 34 45 N | 077 26 02 W |
| Catoctin Furnace School (historical) | School | 164 | Frederick | 39 35 06 N | 077 26 01 W |
| Catoctin Heights (subdivision) | Populated Place | 193 | Frederick | 39 38 15 N | 077 24 49 W |
| Catoctin High School | School | 197 | Frederick | 39 38 19 N | 077 24 34 W |
| Catoctin Highlands (subdivision) | Populated Place | 170 | Frederick | 39 37 59 N | 077 24 30 W |
| Catoctin Hills | Populated Place | 189 | Frederick | 39 27 23 N | 077 32 30 W |
| Catoctin Iron Furnace (historical) | Locale | 218 | Frederick | 39 34 54 N | 077 26 41 W |
| Catoctin Manor Estates | Populated Place | 117 | Frederick | 39 29 29 N | 077 25 06 W |
| Catoctin Mountain | Summit | 572 | Frederick | 39 38 52 N | 077 27 59 W |
| Catoctin Mountain Park | Park | 548 | Frederick | 39 39 14 N | 077 27 60 W |
| Catoctin Mountain Zoological Park | Park | 174 | Frederick | 39 35 27 N | 077 25 51 W |
| Catoctin Parish Episcopal Church | Church | 143 | Frederick | 39 34 47 N | 077 26 00 W |
| Catoctin Park (subdivision) | Populated Place | 99 | Frederick | 39 24 40 N | 077 25 35 W |
| Catoctin Point | Populated Place | 202 | Frederick | 39 21 20 N | 077 31 25 W |
| Catoctin View | Populated Place | 225 | Carroll | 39 36 45 N | 077 02 06 W |
| Catoctin View | Populated Place | 178 | Frederick | 39 23 25 N | 077 14 05 W |
| Catonsville | Populated Place | 146 | Baltimore | 39 16 19 N | 076 43 55 W |
| Catonsville Area Branch Baltimore County Public Library | Building | 157 | Baltimore | 39 16 13 N | 076 44 26 W |
| Catonsville Baptist Church | Church | 157 | Baltimore | 39 16 14 N | 076 44 19 W |
| Catonsville Elementary School | School | 145 | Baltimore | 39 16 17 N | 076 43 50 W |
| Catonsville Fire Department Station 4 | Building | | Baltimore | 39 16 19 N | 076 44 01 W |
| Catonsville Gateway | Populated Place | 134 | Baltimore | 39 17 24 N | 076 45 56 W |
| Catonsville Heights | Populated Place | 147 | Baltimore | 39 16 43 N | 076 44 48 W |
| Catonsville High School | School | 138 | Baltimore | 39 15 34 N | 076 43 53 W |
| Catonsville Manor | Populated Place | 138 | Baltimore | 39 17 47 N | 076 44 01 W |
| Catonsville Middle School | School | 140 | Baltimore | 39 16 05 N | 076 43 51 W |
| Catonsville Park | Park | 155 | Baltimore | 39 16 47 N | 076 45 09 W |
| Catonsville Post Office | Post Office | 154 | Baltimore | 39 16 13 N | 076 44 14 W |
| Catonsville Presbyterian Church | Church | 155 | Baltimore | 39 16 11 N | 076 44 40 W |
| Catonsville United Methodist Church | Church | 153 | Baltimore | 39 16 17 N | 076 44 13 W |
| Cators Cove | Bay | 10 | Dorchester | 38 29 48 N | 076 18 46 W |
| Cattail Branch | Stream | | Anne Arundel | 38 52 53 N | 076 33 12 W |
| Cattail Branch | Stream | | Frederick | 39 40 11 N | 077 14 42 W |
| Cattail Branch | Stream | | Harford | 39 39 15 N | 076 29 26 W |
| Cattail Branch | Stream | | Prince George's | 38 55 42 N | 076 53 39 W |
| Cattail Creek | Bay | 0 | Anne Arundel | 39 05 07 N | 076 31 30 W |
| Cattail Creek | Stream | | Howard | 39 14 16 N | 077 02 40 W |
| Cattail Island | Island | 4 | Dorchester | 38 23 17 N | 076 16 53 W |
| Cattail Point | Cape | 0 | Baltimore | 39 14 23 N | 076 29 57 W |
| Cattail Pond | Lake | 27 | Anne Arundel | 39 05 46 N | 076 34 24 W |
| Cattail Pond | Lake | 4 | Dorchester | 38 24 32 N | 076 06 08 W |
| Cattail Reservoir | Reservoir | 197 | Harford | 39 37 36 N | 076 29 59 W |
| Cattertons Reach | Populated Place | 43 | Calvert | 38 42 30 N | 076 37 28 W |
| Catts Corner | Populated Place | 25 | Kent | 39 17 05 N | 076 05 44 W |
| Caulk Cove | Bay | 0 | Talbot | 38 45 12 N | 076 16 31 W |
| Caulk Point | Cape | -2 | Talbot | 38 44 45 N | 076 16 45 W |
| Caulks Field | Area | 19 | Kent | 39 12 26 N | 076 11 49 W |
| Caulks Field Memorial | Park | 18 | Kent | 39 12 24 N | 076 11 55 W |
| Cavalier Country | Populated Place | 46 | Calvert | 38 44 54 N | 076 37 49 W |
| Cave Valley | Populated Place | 177 | Baltimore | 39 26 55 N | 076 44 39 W |
| Cave Valley | Populated Place | 178 | Baltimore | 39 27 09 N | 076 45 04 W |
| Caves Ore Bank | Mine | 154 | Baltimore | 39 26 05 N | 076 44 14 W |
| Caves Park | Populated Place | 174 | Baltimore | 39 26 24 N | 076 43 32 W |
| Caves Valley Country Club | Locale | 152 | Baltimore | 39 26 35 N | 076 44 19 W |
| Caveswood | Populated Place | 186 | Baltimore | 39 25 35 N | 076 44 56 W |
| Cavetown | Populated Place | 222 | Washington | 39 38 39 N | 077 35 09 W |
| Cavetown Post Office | Post Office | 224 | Washington | 39 38 38 N | 077 35 08 W |
| Cavey Cemetery | Cemetery | 111 | Howard | 39 14 51 N | 076 46 31 W |
| Cayots | Populated Place | 23 | Cecil | 39 29 09 N | 075 50 52 W |
| Cearfoss | Populated Place | 156 | Washington | 39 42 03 N | 077 46 32 W |
| Cecil Cemetery | Cemetery | 280 | Allegany | 39 35 29 N | 078 50 39 W |
| Cecil Community Center | Building | 140 | Cecil | 39 41 20 N | 076 02 21 W |
| Cecil Community College | School | 95 | Cecil | 39 38 32 N | 075 57 25 W |
| Cecil Community College | School | 90 | Cecil | 39 38 29 N | 075 57 23 W |
| Cecil Community College | School | 6 | Cecil | 39 36 09 N | 075 50 43 W |
| Cecil County | Civil | 24 | Cecil | 39 34 00 N | 075 56 59 W |
| Cecil County Airpark | Airport | 41 | Cecil | 39 38 57 N | 075 48 04 W |
| Cecil County Courthouse | Building | 9 | Cecil | 39 36 30 N | 075 49 44 W |
| Cecil County Drag Strip | Locale | 98 | Cecil | 39 38 13 N | 075 59 14 W |
| Cecil County Dragway | Locale | 98 | Cecil | 39 38 13 N | 075 59 14 W |
| Cecil County Poor House (historical) | Building | 60 | Cecil | 39 39 11 N | 075 51 25 W |
| Cecil County Public Library | Building | 9 | Cecil | 39 36 31 N | 075 49 42 W |
| Cecil County Sheriffs Office | Building | | Cecil | 40 00 32 N | 076 24 02 W |
| Cecil County Special Education Center | School | 10 | Cecil | 39 36 38 N | 075 49 57 W |
| Cecil Creek | Stream | | St. Mary's | 38 17 07 N | 076 42 18 W |
| Cecil Elementary School | School | 35 | Baltimore (city) | 39 18 50 N | 076 36 21 W |
| Cecil Manor | Populated Place | 46 | Cecil | 39 39 25 N | 075 49 02 W |
| Cecil Manor Elementary School | School | 46 | Cecil | 39 39 29 N | 075 49 02 W |
| Cecil Manor School | School | 46 | Cecil | 39 39 30 N | 075 49 02 W |
| Cecil Memorial United Methodist Church | Church | 22 | Anne Arundel | 38 58 48 N | 076 31 43 W |
| Cecil Vocational Technical Center | School | 83 | Cecil | 39 38 15 N | 075 57 22 W |
| Cecil-Kent Medical Center | Hospital | 21 | Cecil | 39 23 52 N | 075 52 19 W |
| Cecils Mill Historic District | Park | 5 | St. Mary's | 38 14 25 N | 076 30 13 W |
| Cecilton | Populated Place | 21 | Cecil | 39 24 14 N | 075 52 03 W |
| Cecilton Branch Cecil County Public Library | Building | 23 | Cecil | 39 24 14 N | 075 51 51 W |
| Cecilton Elementary School | School | 20 | Cecil | 39 24 20 N | 075 52 27 W |
| Cecilton Elementary School Annex | School | 24 | Cecil | 39 24 03 N | 075 51 12 W |
| Cecilton Park | Park | 22 | Cecil | 39 24 18 N | 075 51 43 W |
| Cecilton Post Office | Post Office | 21 | Cecil | 39 24 16 N | 075 52 10 W |
| Cecilton Town Hall | Building | 21 | Cecil | 39 24 16 N | 075 52 09 W |