Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Dentsville Bridge | Bridge | 10 | Charles | 38 29 26 N | 076 55 35 W |
| Devilbiss Bridge | Bridge | 82 | Frederick | 39 30 26 N | 077 22 37 W |
| Dover Bridge | Bridge | 3 | Talbot | 38 45 25 N | 075 59 50 W |
| Duvall Bridge | Bridge | 24 | Prince George's | 39 02 42 N | 076 47 20 W |
| Elk Forge Bridge (historical) | Bridge | 19 | Cecil | 39 38 56 N | 075 49 18 W |
| Evitts Creek Aqueduct | Bridge | 183 | Allegany | 39 37 31 N | 078 44 23 W |
| Fifteen Mile Creek Aqueduct | Bridge | 140 | Allegany | 39 37 27 N | 078 23 11 W |
| Four Points Bridge | Bridge | 109 | Frederick | 39 40 18 N | 077 18 03 W |
| Francis Scott Key Bridge | Bridge | -3 | Baltimore | 39 13 03 N | 076 31 38 W |
| German Branch Bridge | Bridge | 12 | Queen Anne's | 39 00 33 N | 075 56 14 W |
| Gilpins Covered Bridge | Bridge | 93 | Cecil | 39 38 55 N | 075 57 22 W |
| Glendale Bridge | Bridge | 750 | Garrett | 39 30 20 N | 079 18 39 W |
| Gormania Bridge | Bridge | 708 | Garrett | 39 17 35 N | 079 20 49 W |
| Governor Bridge | Bridge | 6 | Prince George's | 38 57 05 N | 076 41 35 W |
| Hanover Street Bridge | Bridge | -4 | Baltimore (city) | 39 15 29 N | 076 36 58 W |
| Harrison Ferry Bridge | Bridge | 0 | Dorchester | 38 37 50 N | 075 49 09 W |
| Harry W Kelly Memorial Bridge | Bridge | -13 | Worcester | 38 19 59 N | 075 05 35 W |
| Harry W Nice Memorial Bridge | Bridge | -15 | Charles | 38 21 41 N | 076 59 51 W |
| Hicks Bridge | Bridge | 103 | Washington | 39 29 16 N | 077 42 50 W |
| High Bridge | Bridge | 43 | Prince George's | 38 59 16 N | 076 46 24 W |
| Hills Bridge | Bridge | 1 | Prince George's | 38 48 40 N | 076 42 42 W |
| Island Creek Bridge | Bridge | 2 | Queen Anne's | 39 08 00 N | 076 03 05 W |
| James Rumsey Bridge | Bridge | 85 | Washington | 39 26 11 N | 077 48 05 W |
| Jericho Covered Bridge | Bridge | 36 | Harford | 39 27 35 N | 076 23 15 W |
| Jug Bridge | Bridge | 69 | Frederick | 39 23 54 N | 077 22 01 W |
| Le Gore Bridge | Bridge | 109 | Frederick | 39 34 51 N | 077 18 46 W |
| Lemons Bridge (historical) | Bridge | 18 | Anne Arundel | 39 02 13 N | 076 45 32 W |
| Licking Creek Aqueduct | Bridge | 114 | Washington | 39 39 04 N | 078 02 55 W |
| Lily Pons Bridge | Bridge | 61 | Frederick | 39 17 38 N | 077 26 15 W |
| Lilypons Bridge | Bridge | 61 | Frederick | 39 17 35 N | 077 26 14 W |
| Lower Bridge | Bridge | 98 | Washington | 39 27 02 N | 077 43 55 W |
| Loys Station Covered Bridge | Bridge | 106 | Frederick | 39 36 32 N | 077 21 04 W |
| Manokin Bridge (historical) | Bridge | 0 | Somerset | 38 12 25 N | 075 41 38 W |
| Mason Bridge | Bridge | 9 | Caroline | 39 00 16 N | 075 54 41 W |
| Mason Bridge | Bridge | 9 | Caroline | 39 00 15 N | 075 54 39 W |
| Meredith Bridge (historical) | Bridge | 72 | Baltimore | 39 27 10 N | 076 34 08 W |
| Miles River Bridge | Bridge | -3 | Talbot | 38 47 40 N | 076 07 36 W |
| Millard E Tydings Memorial Bridge | Bridge | -51 | Cecil | 39 34 50 N | 076 06 22 W |
| Millers Bridge | Bridge | 102 | Frederick | 39 36 11 N | 077 17 34 W |
| Old Conowingo Iron Bridge | Bridge | 57 | Cecil | 39 41 04 N | 076 11 55 W |
| Old Forge Bridge | Bridge | 38 | Anne Arundel | 39 05 45 N | 076 45 56 W |
| Old Mill Road Bridge | Bridge | 105 | Frederick | 39 36 07 N | 077 20 19 W |
| Pivot Bridge (historical) | Bridge | 4 | Cecil | 39 32 08 N | 075 46 57 W |
| Plum Creek Bridge | Bridge | 0 | Cecil | 39 34 08 N | 075 51 55 W |
| Pocomoke City Bridge | Bridge | 0 | Worcester | 38 04 35 N | 075 34 16 W |
| Poffenberger Road Bridge | Bridge | 102 | Frederick | 39 22 53 N | 077 34 17 W |
| Popes Creek Bridge | Bridge | 1 | Charles | 38 23 47 N | 076 59 20 W |
| Porter Bridge | Bridge | 24 | Cecil | 39 41 24 N | 076 07 41 W |
| Porters Crossing | Bridge | 1 | Worcester | 38 13 22 N | 075 21 48 W |
| Porterstown Bridge | Bridge | 105 | Washington | 39 27 54 N | 077 43 30 W |
| Priest Bridge | Bridge | 8 | Prince George's | 38 59 19 N | 076 42 21 W |
| Priestford Bridge | Bridge | 36 | Harford | 39 36 05 N | 076 15 36 W |
| Queen Anne Bridge | Bridge | 2 | Anne Arundel | 38 53 42 N | 076 40 34 W |
| Riva Bridge | Bridge | -5 | Anne Arundel | 38 57 21 N | 076 34 23 W |
| Roddy Road Covered Bridge | Bridge | 140 | Frederick | 39 38 27 N | 077 23 38 W |
| Saint George Island Bridge | Bridge | 4 | St. Mary's | 38 08 10 N | 076 29 57 W |
| Scotchmans Creek Bridge | Bridge | 0 | Cecil | 39 27 40 N | 075 52 32 W |
| Seneca Creek Aqueduct | Bridge | 56 | Montgomery | 39 04 07 N | 077 20 29 W |
| Severn River Bridge | Bridge | 0 | Anne Arundel | 38 59 36 N | 076 29 15 W |
| Severn River Bridge | Bridge | -29 | Anne Arundel | 39 00 23 N | 076 30 14 W |
| Sideling Hill Creek Aqueduct | Bridge | 125 | Allegany | 39 38 22 N | 078 20 03 W |
| Simonds Bridge | Bridge | 30 | Anne Arundel | 39 05 31 N | 076 46 05 W |
| Sixes Bridge | Bridge | 100 | Carroll | 39 37 50 N | 077 17 19 W |
| Snells Bridge | Bridge | 100 | Howard | 39 09 43 N | 076 58 25 W |
| Snow Hill Bridge | Bridge | 4 | Worcester | 38 10 43 N | 075 23 41 W |
| South River Bridge | Bridge | -5 | Anne Arundel | 38 57 06 N | 076 33 14 W |
| Spesutie Island Bridge | Bridge | 0 | Harford | 39 28 30 N | 076 05 48 W |
| Stafford Bridge | Bridge | 16 | Harford | 39 37 22 N | 076 09 51 W |
| Stones Bridge | Bridge | 6 | Charles | 38 24 08 N | 076 58 56 W |
| Suicide Bridge | Bridge | 5 | Dorchester | 38 37 54 N | 075 56 47 W |
| Susquehanna Bridge | Bridge | 5 | Cecil | 39 34 09 N | 076 05 14 W |
| Thomas Hatem Memorial Bridge | Bridge | 24 | Cecil | 39 33 44 N | 076 05 12 W |
| Thomas Johnson Bridge | Bridge | -3 | St. Mary's | 38 19 30 N | 076 28 24 W |
| Thomas Viaduct | Bridge | 5 | Howard | 39 13 18 N | 076 42 47 W |
| Tonoloway Creek Aqueduct | Bridge | 119 | Washington | 39 41 38 N | 078 09 23 W |
| Town Creek Aqueduct | Bridge | 161 | Allegany | 39 31 23 N | 078 32 39 W |
| Trappe Bridge | Bridge | 2 | Charles | 38 25 08 N | 077 11 35 W |
| Tuckahoe Bridge | Bridge | -3 | Caroline | 38 49 52 N | 075 54 50 W |
| Tuckahoe Bridge | Bridge | 0 | Queen Anne's | 38 55 02 N | 075 56 45 W |
| Twenty-First Bridge | Bridge | 245 | Allegany | 39 27 06 N | 078 57 40 W |
| Utica Covered Bridge | Bridge | 104 | Frederick | 39 31 30 N | 077 23 52 W |
| Waverly Street Bridge | Bridge | 280 | Allegany | 39 29 06 N | 079 02 44 W |
| Wiley Ford Bridge | Bridge | 182 | Allegany | 39 37 18 N | 078 46 24 W |
| William Preston Lane Junior Memorial Bridge | Bridge | -2 | Queen Anne's | 38 59 23 N | 076 21 49 W |
| William T Roe Memorial Bridge | Bridge | 12 | Queen Anne's | 39 12 33 N | 075 50 20 W |
| Wilson Bridge | Bridge | 108 | Washington | 39 39 28 N | 077 50 53 W |
| Winchester and Potomac Railroad Bridge | Bridge | 73 | Washington | 39 19 25 N | 077 43 40 W |
| Aberdeen Branch Harford County Library | Building | 28 | Harford | 39 30 45 N | 076 09 50 W |
| Aberdeen Fire Department Company 2 House 1 | Building | | Harford | 39 51 22 N | 076 16 53 W |
| Aberdeen Fire Department Company 2 House 2 | Building | | Harford | 39 51 03 N | 076 16 13 W |
| Aberdeen Fire Department Company 2 House 3 | Building | | Harford | 39 52 21 N | 076 17 24 W |
| Aberdeen Police Department | Building | | Harford | 39 51 16 N | 076 16 45 W |
| Abingdon Fire Company | Building | | Harford | 39 47 30 N | 076 29 29 W |
| Accident Volunteer Fire Department | Building | 724 | Garrett | 39 37 40 N | 079 19 09 W |
| Accokeek Branch Library | Building | 59 | Prince George's | 38 40 09 N | 077 01 43 W |
| Accokeek Branch Prince George's County Memorial Library | Building | 58 | Prince George's | 38 40 11 N | 077 01 34 W |
| Accokeek Volunteer Fire Department Company 24 | Building | | Prince George's | 39 07 04 N | 077 03 06 W |
| Ackerson Hall | Building | 93 | Baltimore (city) | 39 22 11 N | 076 39 19 W |
| Administration Headquarters Police Station | Building | 133 | Montgomery | 39 06 08 N | 077 11 16 W |
| Administrative Offices Prince George's County Memorial Library System | Building | 24 | Prince George's | 38 58 07 N | 076 56 59 W |
| AFI Silver Theatre and Cultural Center | Building | 105 | Montgomery | 38 59 47 N | 077 01 38 W |
| Albert S Cook Library | Building | 126 | Baltimore | 39 23 37 N | 076 36 24 W |
| Alcock House | Building | | Baltimore | 39 24 30 N | 076 35 28 W |
| Alex Haley Residence Hall | Building | | Prince George's | 39 01 10 N | 076 45 25 W |
| Allegany County Courthouse | Building | 209 | Allegany | 39 39 03 N | 078 46 01 W |
| Allegany County Public Library | Building | 209 | Allegany | 39 39 04 N | 078 46 00 W |
| Allegany Hall | Building | 604 | Allegany | 39 39 07 N | 078 55 45 W |
| Allegany State Police Department | Building | | Allegany | 40 04 37 N | 079 23 25 W |
| Allen Residence Hall | Building | 603 | Allegany | 39 39 04 N | 078 55 50 W |
| Allentown Road Volunteer Fire Department Company 32 | Building | | Prince George's | 39 17 35 N | 077 35 29 W |