| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Notes |
| 1 | 80 ton | Shay3Tr | 4'-8½" | GC&E | B&O Railroad Museum, Baltimore, MD | display |  |
| | 2-2-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | operational | Named Tom Thumb, replica |
| 13 | | 4-2-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | operational | Named Lafayette, replica |
| 4(714) | | 0-4-0T | 4'-8½" | St Eliz Hosp (USATC) | B&O Railroad Museum, Baltimore, MD | operational |  |
| | 0-4-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named Atlantic |
| 8 | | 0-4-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named John Hancock |
| 25 | | 4-4-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | operational | Named William Mason |
| 592 | P-6s / A-28 | 4-4-2C | 4'-8½" | CNJ | B&O Railroad Museum, Baltimore, MD | display |  |
| 600 | | 2-6-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named J.C. Davis |
| 1 | | 4-6-0 | 4'-8½" | Clinchfield | B&O Railroad Museum, Baltimore, MD | display |  |
| 117 (147) | | 4-6-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named Thatcher Perkins B |
| 217 (305) | | 4-6-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named Camel |
| 377 (108) | F-11 | 4-6-0 | 4'-8½" | C&O(CR&M) | B&O Railroad Museum, Baltimore, MD | display | |
| 5300 | P7 | 4-6-2 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named President Washington |
| 490 | L1a | 4-6-4 | 4'-8½" | C&O | B&O Railroad Museum, Baltimore, MD | display |  |
| 57 | | 0-8-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named Memnon |
| 545 | E-8 | 2-8-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Named A.J. Cromwell |
| 4500 | Q3 | 2-8-2 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display |  |
| 2705 | K-4 | 2-8-4 | 4'-8½" | C&O | B&O Railroad Museum, Baltimore, MD | display | |
| 1(2101) | T-1 | 4-8-4 | 4'-8½" | Reading | B&O Railroad Museum, Baltimore, MD | display |  |
| 1309 | H-6 | 2-6-6-2 | 4'-8½" | C&O | B&O Railroad Museum, Baltimore, MD | display |  |
| 1604 | H-8 | 2-6-6-6 | 4'-8½" | C&O | B&O Railroad Museum, Baltimore, MD | display |  |
| 11 | | 2-6-0 | 4'-8½" | B&H | Western MD Scenic, Cumberland, MD | restoration | Originally built for export to Cuba. From M&NJ Shops, Middletown, NY. Sold to Everett Railroad, Duncansville, PA |
| 734(34) | | 2-8-0 | 4'-8½" | WM(LS&I) | Western MD Scenic, Cumberland, MD | operational |  |
| | 0-4-0T | ng | Phillip Holzmann Ag | Leyh Steam Museum, Ellicott City, MD | display |  |
| 14(1) | G-7-S | 2-8-0 | 4'-8½" | BC&G (KC&NW) | Railway Museum, Gaithersburg, MD | display |  |
| 202 | K-2 | 4-6-2 | 4'-8½" | WM | Hagerstown City Park, Hagerstown, MD | display |  |
| | 2-4-0 | 36" | | Six Flags America, Largo, MD | operational (diesel) | Named Beatrice, from Opryland, Nashville, later Astroworld, Houston |
| | 4-4-0 | 24" | | Frontier City, Ocean City, MD | operational |  |
| 1 | 35 ton | 0-4-0F | 4'-8½" | Potomac El Power | Smithsonian Warehouse, Silver Hills, MD | stored |  |