| Areas | 15 |
| Bars | 58 |
| Basins | 10 |
| Bays | 736 |
| Beaches | 35 |
| Bends | 12 |
| Canals | 43 |
| Capes | 1,146 |
| Channels | 68 |
| Cliffs | 20 |
| Crossings | 23 |
| Falls | 11 |
| Flats | 10 |
| Gaps | 12 |
| Guts | 57 |
| Islands | 301 |
| Lakes | 171 |
| Pillars | 3 |
| Ranges | 4 |
| Rapids | 8 |
| Reservoirs | 250 |
| Ridges | 60 |
| Springs | 48 |
| Streams | 2,051 |
| Summits | 218 |
| Swamps | 215 |
| Valleys | 84 |
| Woods | 3 |
| Airports | |
| Public and Private Airports | 126 |
| Heliports | 64 |
| Seaplane Bases and Anchorages | 4 |
| Cemeteries | 1,564 |
| Education - Schools | |
| Other Schools | 616 |
| Elementary Schools | 833 |
| Middle Schools | 219 |
| High Schools | 252 |
| Colleges & University | 71 |
| Technical & Trade School | 26 |
| Emergency Response & Law Enforcement | |
| Ambulance Service | 55 |
| Fire Station & EMS Station | 507 |
| Law Enforcement | 235 |
| Prisons & Correctional Facilities | 30 |
| Federal Lands & Reserves | |
| National Cemeteries | 4 |
| Parks | 19 |
| Wildlife Areas | 8 |
| Government Services | |
| City or Town Hall | 146 |
| Court House | 26 |
| Post Offices | 462 |
| Hospitals & Medical Centers | 70 |
| Public Landmarks & Attractions | |
| Campgrounds | 28 |
| Picnic Areas | 50 |
| Trailheads | 37 |
| Visitor Centers | 18 |
| Canals | 1 |
| Capes | 3 |
| Civil | 24 |
| Crossings | 25 |
| Guts | 1 |
| Islands | 39 |
| Lakes | 1 |
| Military (Historical) | 56 |
| Populated Places | 167 |
| Reservoirs | 11 |
| Streams | 1 |
| Swamps | 3 |
| Woods | 4 |
| Maryland's National Historic Landmarks | |
|---|---|
| 71 | |