Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| The Narrows | Channel | -2 | Anne Arundel | 39 04 05 N | 076 34 44 W |
| The Narrows | Gap | 198 | Allegany | 39 40 07 N | 078 47 06 W |
| The National Colonial Farm | Park | 8 | Prince George's | 38 41 27 N | 077 04 15 W |
| The Neck | Cape | 164 | Washington | 39 35 44 N | 077 56 33 W |
| The Oaks | Populated Place | 34 | Calvert | 38 35 42 N | 076 38 43 W |
| The Oaks | Populated Place | 136 | Howard | 39 17 10 N | 076 47 43 W |
| The Oaks at Five Farms | Populated Place | 171 | Baltimore | 39 26 37 N | 076 39 14 W |
| The Orchards | Populated Place | 143 | Howard | 39 17 56 N | 076 50 03 W |
| The Park School | School | 101 | Baltimore | 39 23 34 N | 076 40 37 W |
| The Park Seventh Day Adventist Church (historical) | Church | 10 | Wicomico | 38 22 01 N | 075 35 06 W |
| The Peach Orchard | Populated Place | 60 | Anne Arundel | 39 08 15 N | 076 42 59 W |
| The Peoples Baptist Church | Church | 93 | Frederick | 39 25 09 N | 077 24 41 W |
| The Pines | Populated Place | 88 | Howard | 39 09 47 N | 076 51 57 W |
| The Pines | Populated Place | 8 | Kent | 39 19 30 N | 076 05 04 W |
| The Pines at Deep Run | Populated Place | 181 | Baltimore | 39 28 00 N | 076 41 57 W |
| The Pines Campground | Locale | 141 | Harford | 39 40 38 N | 076 15 03 W |
| The Plains | Populated Place | 18 | Caroline | 39 00 13 N | 075 53 14 W |
| The Plains | Populated Place | 51 | Charles | 38 26 57 N | 076 51 54 W |
| The Plains (historical) | Locale | 6 | St. Mary's | 38 29 13 N | 076 40 44 W |
| The Plantations | Populated Place | 183 | Montgomery | 39 14 58 N | 077 11 50 W |
| The Pocket | Bay | 0 | Worcester | 38 24 27 N | 075 09 47 W |
| The Pointe | Populated Place | 47 | Harford | 39 28 06 N | 076 19 04 W |
| The Pond | Populated Place | 128 | Harford | 39 33 45 N | 076 22 41 W |
| The Ponderosa | Populated Place | 203 | Montgomery | 39 17 06 N | 077 16 58 W |
| The Prong | Bay | -3 | Somerset | 37 56 11 N | 075 52 04 W |
| The Provinces | Populated Place | 53 | Anne Arundel | 39 07 56 N | 076 42 59 W |
| The Ridges | Populated Place | 28 | Anne Arundel | 38 59 26 N | 076 35 44 W |
| The Ridings | Populated Place | 5 | Anne Arundel | 38 56 54 N | 076 31 31 W |
| The Riverdale Fire Department Company 7 | Building | | Prince George's | 39 36 24 N | 077 33 46 W |
| The Rock (historical) | Populated Place | 66 | Cecil | 39 42 00 N | 075 53 09 W |
| The Rotunda Shopping Center | Locale | 93 | Baltimore (city) | 39 20 10 N | 076 37 49 W |
| The Sands | Populated Place | 20 | Anne Arundel | 38 52 12 N | 076 40 23 W |
| The Slough | Channel | 1 | Somerset | 37 58 00 N | 076 02 01 W |
| The Sounding | Populated Place | 18 | Calvert | 38 20 45 N | 076 25 56 W |
| The Spout | Falls | 44 | Montgomery | 38 59 58 N | 077 14 58 W |
| The Swamp | Swamp | 5 | Anne Arundel | 38 48 19 N | 076 33 43 W |
| The Tabernacle | Church | 48 | Prince George's | 39 02 51 N | 076 50 16 W |
| The Terrace | Building | 197 | Frederick | 39 40 55 N | 077 21 13 W |
| The Terraces | Populated Place | 90 | Baltimore (city) | 39 22 05 N | 076 39 24 W |
| The Thorfare | Bay | -3 | Worcester | 38 21 25 N | 075 06 03 W |
| The Thorofare | Channel | 0 | Dorchester | 38 14 48 N | 076 09 06 W |
| The Tidepond | Bay | -5 | Dorchester | 38 15 06 N | 075 57 44 W |
| The Timbers | Populated Place | 29 | Anne Arundel | 39 02 38 N | 076 30 25 W |
| The Timbers | Populated Place | 13 | Harford | 39 25 54 N | 076 16 26 W |
| The Upton School- Home and Hospital Services | School | 52 | Baltimore (city) | 39 17 53 N | 076 38 07 W |
| The Valley School | School | 156 | Baltimore | 39 25 02 N | 076 43 55 W |
| The Villa | Building | 2 | St. Mary's | 38 09 01 N | 076 26 25 W |
| The Village | Populated Place | 22 | Anne Arundel | 39 00 01 N | 076 31 23 W |
| The Village | Populated Place | 164 | Baltimore | 39 23 26 N | 076 43 36 W |
| The Village | Populated Place | 67 | Prince George's | 38 41 48 N | 076 50 05 W |
| The Village at Church Hill Crossing (subdivision) | Populated Place | 11 | Queen Anne's | 39 08 38 N | 075 59 07 W |
| The Village Mall Shopping Center | Locale | 119 | Montgomery | 39 10 18 N | 077 11 21 W |
| The Welcome Mission | Church | 41 | Charles | 38 28 37 N | 077 05 59 W |
| The Willows | Populated Place | 120 | Howard | 39 15 06 N | 076 51 14 W |
| The Willows of Ruxton | Populated Place | 140 | Baltimore | 39 24 35 N | 076 37 44 W |
| The Woods | Populated Place | 48 | Anne Arundel | 39 00 53 N | 076 33 30 W |
| The Woods Academy | School | 105 | Montgomery | 39 00 30 N | 077 08 17 W |
| The Woods of Marlton | Populated Place | 32 | Prince George's | 38 45 52 N | 076 46 54 W |
| The Woods of Town Point | Populated Place | 9 | Cecil | 39 29 32 N | 075 55 06 W |
| The Wye Episcopal Church | Church | 6 | Queen Anne's | 38 59 25 N | 076 09 19 W |
| The Young School | School | 117 | Howard | 39 10 20 N | 076 52 40 W |
| Theodore | Populated Place | 126 | Cecil | 39 38 19 N | 076 00 36 W |
| Theodore McKeldin Gymnasium | Building | | Prince George's | 39 01 14 N | 076 45 33 W |
| Third Cove | Bay | 0 | Calvert | 38 19 57 N | 076 28 32 W |
| Third Evangelical Lutheran Church | Church | 73 | Baltimore (city) | 39 19 32 N | 076 35 22 W |
| Third Evangelical United Brethren Church | Church | 39 | Baltimore (city) | 39 17 09 N | 076 38 44 W |
| Third Haven Friends Meeting House | Church | 5 | Talbot | 38 46 00 N | 076 04 34 W |
| Third Haven Heights (subdivision) | Populated Place | 4 | Talbot | 38 46 36 N | 076 05 07 W |
| Third Haven Meeting Burial Ground | Cemetery | 5 | Talbot | 38 46 02 N | 076 04 34 W |
| Third Mine Branch | Stream | | Baltimore | 39 37 54 N | 076 38 23 W |
| Third Street Park | Park | 91 | Frederick | 39 25 02 N | 077 24 21 W |
| Thistle | Populated Place | 66 | Baltimore | 39 15 13 N | 076 46 01 W |
| Thomas | Populated Place | 1 | Dorchester | 38 34 17 N | 076 16 37 W |
| Thomas Athletic Field | Locale | | Frederick | 39 42 46 N | 077 42 19 W |
| Thomas Avenue School (historical) | School | 8 | Cecil | 39 35 47 N | 075 56 12 W |
| Thomas Branch | Stream | | Anne Arundel | 39 02 47 N | 076 47 01 W |
| Thomas Branch | Stream | | Calvert | 38 24 23 N | 076 24 39 W |
| Thomas Branch | Stream | | Montgomery | 38 59 27 N | 077 09 36 W |
| Thomas Cemetery | Cemetery | 15 | Queen Anne's | 39 12 35 N | 075 59 13 W |
| Thomas Claggett Elementary School | School | 76 | Prince George's | 38 51 51 N | 076 53 23 W |
| Thomas Creek | Stream | | Baltimore (city) | 39 12 30 N | 076 33 02 W |
| Thomas Edison High School of Technology | School | 113 | Montgomery | 39 03 36 N | 077 04 05 W |
| Thomas G Hayes Elementary School | School | 11 | Baltimore (city) | 39 17 48 N | 076 35 58 W |
| Thomas Hatem Memorial Bridge | Bridge | 24 | Cecil | 39 33 44 N | 076 05 12 W |
| Thomas Island Gut | Gut | 0 | Somerset | 38 05 45 N | 076 00 50 W |
| Thomas Jefferson School | School | 116 | Baltimore (city) | 39 17 43 N | 076 41 53 W |
| Thomas Johnson Bridge | Bridge | -3 | St. Mary's | 38 19 30 N | 076 28 24 W |
| Thomas Johnson Middle School | School | 46 | Prince George's | 38 57 38 N | 076 50 27 W |
| Thomas Manor | Populated Place | 49 | Charles | 38 28 15 N | 076 53 52 W |
| Thomas Playground | Park | 99 | Frederick | 39 24 41 N | 077 25 32 W |
| Thomas Point | Cape | 3 | Anne Arundel | 39 11 27 N | 076 34 34 W |
| Thomas Point | Cape | 0 | Anne Arundel | 38 54 28 N | 076 27 37 W |
| Thomas Point | Cape | 2 | Charles | 38 22 58 N | 077 14 59 W |
| Thomas Point | Cape | 0 | Dorchester | 38 32 29 N | 076 08 48 W |
| Thomas Point | Cape | 3 | Somerset | 38 05 12 N | 076 00 25 W |
| Thomas Point | Cape | 0 | St. Mary's | 38 19 55 N | 076 29 24 W |
| Thomas Point Park | Park | 3 | Anne Arundel | 38 54 28 N | 076 27 47 W |
| Thomas Point Shoal | Bar | 2 | Anne Arundel | 38 54 12 N | 076 26 19 W |
| Thomas Point Shoal Lighthouse | Locale | -2 | Anne Arundel | 38 53 56 N | 076 26 07 W |
| Thomas Pullen Elementary School | School | 55 | Prince George's | 38 54 00 N | 076 51 18 W |
| Thomas Rice Auditorium | Building | 122 | Baltimore | 39 15 55 N | 076 43 26 W |
| Thomas Ridge | Ridge | 692 | Garrett | 39 42 48 N | 079 28 35 W |
| Thomas Run | Populated Place | 63 | Harford | 39 35 26 N | 076 17 01 W |
| Thomas Run | Stream | | Harford | 39 36 17 N | 076 16 26 W |
| Thomas Run Methodist Church | Church | 74 | Harford | 39 35 33 N | 076 17 34 W |
| Thomas Run Park | Park | 121 | Harford | 39 33 20 N | 076 17 05 W |
| Thomas S Stone Elementary School | School | 9 | Prince George's | 38 56 43 N | 076 57 45 W |
| Thomas S Wootten High School | School | 105 | Montgomery | 39 04 37 N | 077 10 60 W |
| Thomas Stone High School | School | 55 | Charles | 38 36 53 N | 076 53 13 W |
| Thomas Stone National Historic Site | Park | 46 | Charles | 38 31 45 N | 077 02 16 W |