Feature Name | Class | Elev.
meters | County | Latitude
DMS | Longitude
DMS |
| Red Gate Golf Course | Locale | 121 | Montgomery | 39 05 44 N | 077 07 42 W |
| Red Hill Station | Locale | 161 | Frederick | 39 35 11 N | 077 25 32 W |
| Red Landing | Locale | 3 | Worcester | 38 09 08 N | 075 26 26 W |
| Red Point Fishery | Locale | 2 | Cecil | 39 31 42 N | 075 58 51 W |
| Redgate Industrial Park | Locale | 126 | Montgomery | 39 05 38 N | 077 07 55 W |
| Reeder Wharf | Locale | 0 | St. Mary's | 38 27 25 N | 076 39 22 W |
| Rees Cross Road | Locale | 7 | Kent | 39 12 53 N | 076 13 34 W |
| Rees Wharf | Locale | 0 | Kent | 39 12 55 N | 076 14 39 W |
| Reese Carnival Grounds | Locale | 249 | Carroll | 39 32 28 N | 076 56 04 W |
| Reisterstown Business Center | Locale | | Baltimore | 39 27 50 N | 076 49 36 W |
| Reisterstown Road Plaza Shopping Center | Locale | 141 | Baltimore (city) | 39 21 23 N | 076 42 22 W |
| Reisterstown Shopping Center | Locale | 207 | Baltimore | 39 26 58 N | 076 48 54 W |
| Reisterstown Village Shopping Center | Locale | 220 | Baltimore | 39 28 10 N | 076 49 49 W |
| Research Office Center | Locale | 126 | Montgomery | 39 06 02 N | 077 11 02 W |
| Research West Industrial Park | Locale | 138 | Montgomery | 39 06 15 N | 077 11 09 W |
| Resolution Farm | Locale | 115 | Frederick | 39 32 21 N | 077 21 29 W |
| Reybold Wharf | Locale | 0 | Cecil | 39 26 52 N | 075 58 36 W |
| Richards Oak | Locale | 87 | Cecil | 39 41 39 N | 076 06 51 W |
| Ridgely Oaks Professional Center | Locale | | Anne Arundel | 38 59 48 N | 076 31 01 W |
| Ridgely Plaza Shopping Center | Locale | 111 | Baltimore | 39 25 43 N | 076 37 19 W |
| Ridgeside Business Center | Locale | 243 | Carroll | 39 21 48 N | 077 09 50 W |
| Ridgeview Plaza Shopping Center | Locale | 73 | Anne Arundel | 39 07 49 N | 076 44 24 W |
| Ridgeway Shopping Center | Locale | 146 | Baltimore | 39 17 28 N | 076 43 20 W |
| Riggs Mill (historical) | Locale | 27 | Prince George's | 38 59 33 N | 076 58 19 W |
| Riggs Plaza Shopping Center | Locale | 52 | Prince George's | 38 57 40 N | 076 59 41 W |
| Riggs Sargent Shopping Center | Locale | 36 | Prince George's | 38 58 03 N | 076 59 07 W |
| Ringgolds Green | Locale | 17 | Caroline | 38 51 24 N | 075 43 60 W |
| Rising Sun Plaza Shopping Center | Locale | 104 | Cecil | 39 41 57 N | 076 03 14 W |
| Ritchie Highway Shopping Center | Locale | 47 | Anne Arundel | 39 13 06 N | 076 36 56 W |
| Ritchie Industrial Park | Locale | 44 | Prince George's | 38 53 12 N | 076 51 38 W |
| Riva 400 Office Park | Locale | 17 | Anne Arundel | 38 58 24 N | 076 33 34 W |
| River Valley Ranch | Locale | 237 | Carroll | 39 42 03 N | 076 48 37 W |
| River View | Locale | 3 | St. Mary's | 38 15 45 N | 076 43 53 W |
| Riverdale Plaza Shopping Center | Locale | 19 | Prince George's | 38 57 29 N | 076 55 06 W |
| Rivers Corporate Center | Locale | 92 | Howard | 39 10 12 N | 076 50 60 W |
| Rivers Corporate Park | Locale | 118 | Howard | 39 10 40 N | 076 52 24 W |
| Rivers Ninty Five Industrial Park | Locale | 87 | Howard | 39 10 05 N | 076 50 41 W |
| Rivers Technical Park | Locale | 91 | Howard | 39 10 08 N | 076 50 37 W |
| Riverside Business Park | Locale | 24 | Harford | 39 28 45 N | 076 13 59 W |
| Riverside Wharf | Locale | 30 | Kent | 39 09 41 N | 076 03 12 W |
| Riverside Yard | Locale | 7 | Baltimore (city) | 39 16 05 N | 076 36 12 W |
| Riviera Plaza Shopping Center | Locale | 7 | Anne Arundel | 39 09 29 N | 076 30 59 W |
| Roberts Field Business Center | Locale | 255 | Carroll | 39 35 40 N | 076 50 37 W |
| Rock Center Shopping Center | Locale | 117 | Frederick | 39 25 02 N | 077 26 55 W |
| Rock Creek Village Shopping Center | Locale | 5 | Anne Arundel | 39 09 16 N | 076 31 03 W |
| Rock Creek Village Shopping Center | Locale | 120 | Montgomery | 39 05 40 N | 077 06 39 W |
| Rock Jetty | Locale | 0 | Harford | 39 22 37 N | 076 15 15 W |
| Rock Run Mill | Locale | 16 | Harford | 39 36 29 N | 076 08 35 W |
| Rock Spring Industrial Park | Locale | 89 | Montgomery | 39 01 39 N | 077 09 12 W |
| Rock Spring Shopping Center | Locale | 132 | Harford | 39 33 28 N | 076 22 04 W |
| Rock Springs Swim Club | Locale | 118 | Harford | 39 33 05 N | 076 23 00 W |
| Rockawalking | Locale | 13 | Wicomico | 38 24 08 N | 075 39 36 W |
| Rockdale Professional Center | Locale | | Baltimore | 39 21 19 N | 076 45 57 W |
| Rocks | Locale | 95 | Harford | 39 38 16 N | 076 24 40 W |
| Rockshire Shopping Center | Locale | 119 | Montgomery | 39 04 49 N | 077 11 03 W |
| Rockville Civic Center | Locale | 125 | Montgomery | 39 05 04 N | 077 07 44 W |
| Rockville Metro Station | Locale | 131 | Montgomery | 39 05 02 N | 077 08 44 W |
| Rockville Water Plant | Locale | 75 | Montgomery | 39 01 18 N | 077 13 56 W |
| Rockville Water Treatment Plant | Locale | 81 | Montgomery | 39 02 25 N | 077 15 14 W |
| Rocky Gorge Driving Range | Locale | 119 | Howard | 39 08 10 N | 076 54 30 W |
| Rocky Point Golf Course | Locale | 4 | Baltimore | 39 15 12 N | 076 24 49 W |
| Rocky Springs Station | Locale | 103 | Frederick | 39 26 21 N | 077 26 15 W |
| Rodgers Forge Golf Course | Locale | 132 | Baltimore | 39 23 05 N | 076 35 15 W |
| Rolling Hill Farm | Locale | 40 | Calvert | 38 37 46 N | 076 35 27 W |
| Rolling Road Country Club | Locale | 117 | Baltimore | 39 15 29 N | 076 43 27 W |
| Rolling Road Golf Course | Locale | 109 | Baltimore | 39 15 22 N | 076 43 29 W |
| Rolphs Wharf (historical) | Locale | 2 | Queen Anne's | 39 10 24 N | 076 02 12 W |
| Romancoke Pier | Locale | 5 | Queen Anne's | 38 52 51 N | 076 19 59 W |
| Rose Haven Yacht Club | Locale | -2 | Anne Arundel | 38 43 35 N | 076 32 30 W |
| Rose Hill Plaza Shopping Center | Locale | 95 | Frederick | 39 26 16 N | 077 24 34 W |
| Rose Mill (historical) | Locale | 134 | Washington | 39 35 18 N | 077 42 24 W |
| Rosecroft Raceway | Locale | 30 | Prince George's | 38 47 43 N | 076 57 36 W |
| Rosecroft Shopping Center | Locale | 55 | Prince George's | 38 48 10 N | 076 57 09 W |
| Rosedale | Locale | 7 | St. Mary's | 38 22 10 N | 076 31 16 W |
| Rosedale Industrial Park | Locale | 28 | Baltimore | 39 18 40 N | 076 31 25 W |
| Rosedale Plaza Shopping Center | Locale | 42 | Baltimore | 39 19 48 N | 076 31 10 W |
| Rossmore Leisure World Golf Course | Locale | 132 | Montgomery | 39 06 11 N | 077 04 03 W |
| Rossville Industrial Park | Locale | 37 | Baltimore | 39 21 00 N | 076 27 58 W |
| Rossville Plaza Shopping Center | Locale | | Baltimore | 39 22 15 N | 076 30 22 W |
| Round Meadow Camp Number 4 | Locale | 463 | Frederick | 39 38 42 N | 077 29 12 W |
| Roundtop Wharf | Locale | 3 | Queen Anne's | 39 13 47 N | 076 01 00 W |
| Route 100 Industrial Park | Locale | 48 | Howard | 39 11 16 N | 076 44 50 W |
| Route 124 Plaza Shopping Center | Locale | 166 | Montgomery | 39 09 35 N | 077 09 38 W |
| Route 32 Business Center | Locale | | Anne Arundel | 39 07 24 N | 076 47 07 W |
| Route 94 Business Center | Locale | 206 | Howard | 39 21 00 N | 077 04 04 W |
| Route Three Centre | Locale | 18 | Anne Arundel | 39 00 35 N | 076 41 59 W |
| Rowlands Mill (historical) | Locale | 133 | Washington | 39 35 18 N | 077 42 27 W |
| Roxbury Correctional Institute | Locale | 150 | Washington | 39 33 26 N | 077 42 52 W |
| Roxbury Station | Locale | 150 | Washington | 39 33 42 N | 077 43 06 W |
| Ruffs Mill (historical) | Locale | 81 | Harford | 39 34 39 N | 076 18 41 W |
| Ruggles Golf Course | Locale | 13 | Harford | 39 29 02 N | 076 10 11 W |
| Rullers Fishery | Locale | -6 | Cecil | 39 34 22 N | 075 57 17 W |
| Russell Landing | Locale | 4 | St. Mary's | 38 19 03 N | 076 49 45 W |
| Rutherford Business Center | Locale | 139 | Baltimore | 39 19 59 N | 076 45 10 W |
| Sachs Industrial Park | Locale | 51 | Anne Arundel | 39 12 38 N | 076 40 49 W |
| Safari Campground | Locale | 157 | Washington | 39 34 41 N | 077 47 31 W |
| Saint Charles Business Park North | Locale | 67 | Charles | 38 36 50 N | 076 54 42 W |
| Saint Charles Towne Center Shopping Center | Locale | 65 | Charles | 38 37 00 N | 076 55 34 W |
| Saint Charles Towne Plaza Shopping Center | Locale | 61 | Charles | 38 36 59 N | 076 55 45 W |
| Saint Clements Island Lighthouse (historical) | Locale | 2 | St. Mary's | 38 12 47 N | 076 43 58 W |
| Saint Cuthbert Wharf | Locale | 3 | St. Mary's | 38 21 22 N | 076 30 07 W |
| Saint Elizabeths Manor | Locale | 4 | St. Mary's | 38 07 42 N | 076 24 39 W |
| Saint Gabriels Home | Locale | 99 | Baltimore | 39 14 34 N | 076 44 40 W |
| Saint Inigoes | Locale | 29 | St. Mary's | 38 08 51 N | 076 23 25 W |
| Saint James | Locale | 3 | Worcester | 38 00 26 N | 075 34 43 W |
| Saint James Corners | Locale | 175 | Baltimore | 39 34 04 N | 076 35 30 W |
| Saint Jeromes Manor | Locale | 2 | St. Mary's | 38 07 47 N | 076 19 50 W |
| Saint Johns Plaza Shopping Center | Locale | 127 | Howard | 39 16 41 N | 076 49 37 W |
| Saint Josephs Manor (historical) | Locale | 10 | St. Mary's | 38 18 33 N | 076 28 56 W |
| Saint Lukes | Locale | 15 | Worcester | 38 16 25 N | 075 33 11 W |
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