| 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 | |