Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Cockey Island (historical) | Island | 4 | Kent | 39 00 25 N | 076 12 59 W |
| Cockeys Creek Bog | Swamp | 6 | Anne Arundel | 39 06 18 N | 076 30 28 W |
| Cockeys Old Tavern (historical) | Building | 132 | Baltimore | 39 25 46 N | 076 40 13 W |
| Cockeysville | Populated Place | 94 | Baltimore | 39 28 52 N | 076 38 38 W |
| Cockeysville Area Branch Baltimore County Public Library | Building | 130 | Baltimore | 39 27 37 N | 076 37 48 W |
| Cockeysville Baptist Church | Church | 111 | Baltimore | 39 28 29 N | 076 38 07 W |
| Cockeysville Middle School | School | 109 | Baltimore | 39 28 21 N | 076 37 47 W |
| Cockeysville Road Industrial Park | Locale | 89 | Baltimore | 39 28 42 N | 076 38 54 W |
| Cockeysville Volunteer Fire Company Station 39 | Building | | Baltimore | 39 29 31 N | 076 38 58 W |
| Cocks Point | Cape | -3 | Anne Arundel | 39 03 25 N | 076 33 56 W |
| Cocktown Creek | Stream | | Calvert | 38 37 49 N | 076 40 45 W |
| Cod Creek | Stream | | Harford | 39 21 38 N | 076 14 26 W |
| Codes Point | Cape | 0 | Dorchester | 38 22 55 N | 076 16 05 W |
| Codjus Cove | Bay | -5 | Kent | 39 20 09 N | 076 07 32 W |
| Coffee Hill | Populated Place | 45 | St. Mary's | 38 23 31 N | 076 49 32 W |
| Coffee Hill Run | Stream | | St. Mary's | 38 22 11 N | 076 47 05 W |
| Coffee Hollow | Valley | | Frederick | 39 35 03 N | 077 28 27 W |
| Coffin Point | Cape | 2 | Baltimore | 39 13 56 N | 076 30 13 W |
| Coffins Point | Cape | 1 | Worcester | 38 18 06 N | 075 07 07 W |
| Coffman | Populated Place | 144 | Harford | 39 35 58 N | 076 19 18 W |
| Coffman Chapel | Building | | Frederick | 39 42 26 N | 077 42 13 W |
| Coffman Chapel | Church | 100 | Frederick | 39 25 21 N | 077 25 02 W |
| Coffman Health Center | Hospital | 183 | Washington | 39 39 49 N | 077 42 58 W |
| Cogan Student Union Building | Building | 178 | Frederick | 39 40 49 N | 077 21 07 W |
| Cohansey Village | Populated Place | 29 | Anne Arundel | 39 09 00 N | 076 38 24 W |
| Cohasset | Populated Place | 104 | Montgomery | 38 59 08 N | 077 08 15 W |
| Cohill | Populated Place | 140 | Washington | 39 38 47 N | 078 15 14 W |
| Cohill Estates | Populated Place | 200 | Washington | 39 42 00 N | 078 12 29 W |
| Cohouck Point | Cape | 5 | St. Mary's | 38 21 05 N | 076 50 15 W |
| Cokeland | Populated Place | 0 | Dorchester | 38 24 18 N | 075 52 39 W |
| Cokesbury | Populated Place | 6 | Somerset | 38 07 37 N | 075 34 45 W |
| Cokesbury Cemetery | Cemetery | 121 | Cecil | 39 35 56 N | 076 04 53 W |
| Cokesbury Cemetery | Cemetery | 11 | Dorchester | 38 37 03 N | 075 43 32 W |
| Cokesbury Cemetery | Cemetery | 10 | Dorchester | 38 36 52 N | 075 43 42 W |
| Cokesbury Church | Church | 121 | Cecil | 39 35 56 N | 076 04 53 W |
| Cokesbury Church | Church | 10 | Dorchester | 38 36 51 N | 075 43 43 W |
| Cokesbury Church (historical) | Church | 11 | Dorchester | 38 37 03 N | 075 43 35 W |
| Cokesbury Church (historical) | Church | 3 | Somerset | 38 06 20 N | 075 33 23 W |
| Cokesbury School (historical) | School | 10 | Dorchester | 38 36 38 N | 075 43 48 W |
| Cokesbury United Methodist Church | Church | 56 | Harford | 39 27 38 N | 076 16 36 W |
| Cokesbury United Methodist Church | Church | 5 | Somerset | 38 07 28 N | 075 34 37 W |
| Colbourn Creek | Stream | | Somerset | 38 03 10 N | 075 48 09 W |
| Colbourn Manor | Populated Place | 9 | Wicomico | 38 20 00 N | 075 35 51 W |
| Colbourne | Populated Place | 11 | Worcester | 38 15 41 N | 075 27 15 W |
| Colbourne Branch | Stream | | Worcester | 38 16 56 N | 075 23 08 W |
| Colbourne Cemetery | Cemetery | 12 | Wicomico | 38 18 08 N | 075 27 12 W |
| Colburns Gut | Stream | | Worcester | 38 06 13 N | 075 19 29 W |
| Colby Park | Park | 55 | Prince George's | 38 58 30 N | 076 59 58 W |
| Colby Run | Stream | | Charles | 38 23 07 N | 076 55 28 W |
| Colchester on the Severn | Populated Place | 16 | Anne Arundel | 39 04 22 N | 076 34 19 W |
| Cold Hill Academy (historical) | School | 256 | Montgomery | 39 16 55 N | 077 12 37 W |
| Cold Saturday | Populated Place | 161 | Carroll | 39 29 09 N | 076 53 45 W |
| Cold Spring | Populated Place | 131 | Baltimore (city) | 39 20 54 N | 076 39 28 W |
| Cold Spring Branch | Stream | | Anne Arundel | 39 04 59 N | 076 36 30 W |
| Cold Spring Cove | Bay | 0 | Anne Arundel | 39 05 09 N | 076 31 52 W |
| Cold Spring Elementary School | School | 109 | Montgomery | 39 03 33 N | 077 11 19 W |
| Cold Spring Park | Park | 59 | Baltimore (city) | 39 20 29 N | 076 39 08 W |
| Coldstream | Populated Place | 124 | Frederick | 39 24 47 N | 077 18 34 W |
| Coldstream | Populated Place | 209 | Harford | 39 42 07 N | 076 29 23 W |
| Coldstream Park Elementary School | School | 51 | Baltimore (city) | 39 19 18 N | 076 36 09 W |
| Cole (historical) | Populated Place | 7 | Harford | 39 27 30 N | 076 07 45 W |
| Cole Creek | Stream | | St. Mary's | 38 23 48 N | 076 35 03 W |
| Colebrook | Populated Place | 158 | Frederick | 39 24 45 N | 077 32 44 W |
| Colebrooke | Populated Place | 85 | Prince George's | 38 50 28 N | 076 57 05 W |
| Coleman | Populated Place | 24 | Kent | 39 20 29 N | 076 04 41 W |
| Coleman Wharf (historical) | Locale | 3 | Kent | 39 08 51 N | 076 14 39 W |
| Coles Corner | Populated Place | 79 | Prince George's | 38 46 33 N | 076 52 02 W |
| Coles Creek | Stream | | Calvert | 38 20 17 N | 076 25 54 W |
| Coles Creek | Stream | | Dorchester | 38 23 08 N | 076 04 33 W |
| Colesville | Populated Place | 133 | Montgomery | 39 04 32 N | 077 00 07 W |
| Colesville Baptist Church | Church | 130 | Montgomery | 39 04 11 N | 077 00 18 W |
| Colesville Manor | Populated Place | 131 | Montgomery | 39 05 09 N | 077 00 13 W |
| Colesville Park | Populated Place | 144 | Montgomery | 39 05 55 N | 077 00 13 W |
| Colesville Post Office | Post Office | 123 | Montgomery | 39 04 21 N | 077 00 08 W |
| Colesville School | School | 147 | Montgomery | 39 05 09 N | 076 59 56 W |
| Colesville School (historical) | School | 86 | Howard | 39 07 43 N | 076 50 43 W |
| Colesville United Methodist Church | Church | 141 | Montgomery | 39 04 23 N | 077 00 25 W |
| Colesvivlle United Presbyterian Church | Church | 119 | Montgomery | 39 03 53 N | 077 00 05 W |
| Colgate | Populated Place | 29 | Baltimore | 39 17 47 N | 076 30 59 W |
| Colgate | Populated Place | 6 | Baltimore (city) | 39 16 17 N | 076 33 20 W |
| Colgate Creek | Populated Place | 4 | Baltimore (city) | 39 15 58 N | 076 32 35 W |
| Colgate Creek | Stream | | Baltimore (city) | 39 15 08 N | 076 32 20 W |
| Colgate Elementary School | School | 37 | Baltimore | 39 17 40 N | 076 31 07 W |
| Colgate Recreation Area | Park | 26 | Baltimore | 39 17 50 N | 076 31 16 W |
| Collamore Residence | Building | | Prince George's | 38 58 32 N | 076 51 44 W |
| College Creek | Bay | 4 | Anne Arundel | 38 59 12 N | 076 29 06 W |
| College Estates (subdivision) | Populated Place | 109 | Frederick | 39 26 01 N | 077 25 11 W |
| College Garden Park | Park | 127 | Montgomery | 39 06 02 N | 077 09 46 W |
| College Gardens Elementary School | School | 134 | Montgomery | 39 06 10 N | 077 09 47 W |
| College Gardens Elementary School | School | 135 | Montgomery | 39 06 13 N | 077 09 43 W |
| College Green | Locale | 138 | Cecil | 39 39 55 N | 076 00 60 W |
| College Heights | Populated Place | 26 | Prince George's | 38 58 33 N | 076 56 26 W |
| College Heights Estates | Populated Place | 35 | Prince George's | 38 58 42 N | 076 57 04 W |
| College Hills | Populated Place | 19 | Anne Arundel | 39 03 13 N | 076 30 16 W |
| College Hills | Populated Place | 121 | Baltimore | 39 15 17 N | 076 43 49 W |
| College House | Building | | Frederick | 39 42 29 N | 077 42 17 W |
| College Manor | Populated Place | 20 | Anne Arundel | 39 02 51 N | 076 30 14 W |
| College Mountain | Summit | 520 | Frederick | 39 41 00 N | 077 23 47 W |
| College Park | Populated Place | 21 | Prince George's | 38 58 50 N | 076 56 13 W |
| College Park Airport | Airport | 14 | Prince George's | 38 58 50 N | 076 55 21 W |
| College Park Branch Prince George's County Memorial Library | Building | 20 | Prince George's | 38 58 41 N | 076 56 08 W |
| College Park Plaza Shopping Center | Locale | 103 | Frederick | 39 25 35 N | 077 24 59 W |
| College Park School | School | 18 | Prince George's | 38 58 42 N | 076 56 04 W |
| College Park Shopping Center | Locale | 28 | Prince George's | 38 58 48 N | 076 56 19 W |
| College Park United Methodist Church | Church | 34 | Prince George's | 39 00 39 N | 076 55 18 W |
| College Park Woods | Populated Place | 55 | Prince George's | 39 00 31 N | 076 57 04 W |
| College Park-U of MD Metro Station | Locale | 18 | Prince George's | 38 58 35 N | 076 55 45 W |
| College Parkway Baptist Church | Church | 12 | Anne Arundel | 39 03 06 N | 076 30 24 W |
| College Parkway Shopping Center | Locale | 30 | Anne Arundel | 39 02 18 N | 076 28 47 W |
| College Plaza Shopping Center | Locale | 147 | Montgomery | 39 06 12 N | 077 09 31 W |