Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Carmelite Monastary | Church | 99 | Baltimore | 39 25 20 N | 076 36 11 W |
| Caroline Street Methodist Church | Church | 9 | Baltimore (city) | 39 17 26 N | 076 35 51 W |
| Carollwood Church | Church | 4 | Baltimore | 39 20 14 N | 076 23 36 W |
| Carrol Chapel | Church | 30 | Prince George's | 38 54 57 N | 076 43 09 W |
| Carroll Chapel | Church | 192 | Baltimore | 39 26 48 N | 076 43 08 W |
| Carroll United Methodist Church | Church | 202 | Baltimore | 39 26 29 N | 076 42 53 W |
| Carroll-Western United Methodist Church | Church | 46 | Calvert | 38 31 28 N | 076 37 04 W |
| Carsins Run Baptist Church | Church | 99 | Harford | 39 32 14 N | 076 12 31 W |
| Carters Temple Church of God in Christ | Church | 24 | Baltimore (city) | 39 17 23 N | 076 37 44 W |
| Carters United Methodist Church | Church | 45 | Anne Arundel | 38 44 16 N | 076 35 26 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 |
| Catoctin Parish Episcopal Church | Church | 143 | Frederick | 39 34 47 N | 077 26 00 W |
| Catonsville Baptist Church | Church | 157 | Baltimore | 39 16 14 N | 076 44 19 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 |
| Cecil Memorial United Methodist Church | Church | 22 | Anne Arundel | 38 58 48 N | 076 31 43 W |
| Cecilton United Methodist Church | Church | 21 | Cecil | 39 24 14 N | 075 52 08 W |
| Cedar Grove Church | Church | 2 | Anne Arundel | 38 46 48 N | 076 33 08 W |
| Cedar Grove Church | Church | 218 | Baltimore | 39 34 59 N | 076 43 04 W |
| Cedars Baptist Church | Church | 63 | Howard | 39 10 08 N | 076 47 28 W |
| Cedarville Assembly of God Church | Church | 64 | Prince George's | 38 39 47 N | 076 48 18 W |
| Centenary Church | Church | 313 | Allegany | 39 43 18 N | 078 42 19 W |
| Centennial Memorial United Methodist Church | Church | 89 | Frederick | 39 24 58 N | 077 24 40 W |
| Centennial-Caroline Street United Methodist Church | Church | 13 | Baltimore (city) | 39 17 52 N | 076 36 13 W |
| Center Street Church of God | Church | 5 | Dorchester | 38 33 46 N | 076 04 57 W |
| Central Assembly of God Church | Church | 202 | Allegany | 39 39 08 N | 078 45 59 W |
| Central Baptist Church | Church | 55 | Baltimore (city) | 39 17 16 N | 076 38 59 W |
| Central Baptist Church | Church | 145 | Montgomery | 39 08 51 N | 077 08 46 W |