| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Builder Info | Notes |
|---|
| 2 | | 0-4-0T | 4'-8½" | Bullard Machine | Steamtown National Historic Site, Scranton, PA | display | H.K. Porter #7250, 1937 | Possibly the smallest standard gauge steam locomotive ever built. |
| 43 | | 0-4-0T | 4'-8½" | NH Trap Rock | Steamtown National Historic Site, Scranton, PA | display | Vulcan Iron Works (Wilkes-Barre) #2888, 1918 | Was operational at Steamtown USA. |
| 8 | | 0-6-0 | 4'-8½" | Duquesne Slag Products | Steamtown National Historic Site, Scranton, PA | display | Baldwin #56402, 04/1923 | Ran on the Penn View Mountain Railroad, Blairsville, PA. Now a cut-away display. |
| 26 (3) | | 0-6-0 | 4'-8½" | Baldwin (JI&S) | Steamtown National Historic Site, Scranton, PA | operational | Baldwin #60733, 1929 | |
| 6816 | | 0-6-0F | 4'-8½" | PSE&G | Steamtown National Historic Site, Scranton, PA | display | H.K. Porter #6816, 1923 | |
| 3 | | 0-6-0T | 4'-8½" | EJ Lavino & Co (Poland Spring Water) | Steamtown National Historic Site, Scranton, PA | display | ALCO (Schenectady) #67536, 1927 | |
| 7 | | 2-4-2T | 4'-8½" | Groveton Paper (Berlin Mills) | Steamtown National Historic Site, Scranton, PA | display | Vulcan Iron Works (Wilkes-Barre) #1679, 1911 | From Blackmount & Haverhill Railroad. |
| 210 | | 2-6-0 | 4'-8½" | N&StL | Steamtown National Historic Site, Scranton, PA | display | ALCO (Cooke) #65365, 1923 | |
| 565 | 10c | 2-6-0 | 4'-8½" | DL&W | Steamtown National Historic Site, Scranton, PA | cosmetic restoration | ALCO (Schenectady) #45528, 1908 | From Black River & Western |
| 1 | | 2-6-2 | 4'-8½" | Brooks Scanlon | Steamtown National Historic Site, Scranton, PA | display | Baldwin #41649, 1914 | |
| 519 | W-1 | 2-8-0 | 4'-8½" | MEC | Steamtown National Historic Site, Scranton, PA | display | ALCO (Schenectady) #52991, 1913 | |
| 790 | | 2-8-0 | 4'-8½" | IC | Steamtown National Historic Site, Scranton, PA | display | ALCO (Cooke) #28686, 1903 | |
| 15 | | 2-8-0 | 4'-8½" | Rahway Valley | Steamtown National Historic Site, Scranton, PA | display | Baldwin #43529, 1916 | Once operated at Steamtown |
| 1923 | | 2-8-0 | 4'-8½" | Lowville & Beaver River | Steamtown National Historic Site, Scranton, PA | display | ALCO (Cooke) #62623, 1920 | |
| 3254 (2854) | S-1-b | 2-8-2 | 4'-8½" | CNR | Steamtown National Historic Site, Scranton, PA | out of service | CLC, 1917 | Bent frame. |
| 3377 (2977) | S-1-d | 2-8-2 | 4'-8½" | CNR | Steamtown National Historic Site, Scranton, PA | display | CLC, 1919 | |
| 759 | S2 | 2-8-4 | 4'-8½" | NYC&StL | Steamtown National Historic Site, Scranton, PA | display | Lima #8667, 1944 | Operated excursions in the 1960s and 1970s |
| 2929 | F1a | 4-4-4 | 4'-8½" | CPR | Steamtown National Historic Site, Scranton, PA | display | CLC #1943, 1938 | |
| 44 | P | 4-6-0 | 4'-8½" | NYC&StL | Steamtown National Historic Site, Scranton, PA | display | ALCO (Brooks) #38831, 1905 | Oldest surviving Nickel Plate locomotive |
| 2317 | G3c | 4-6-2 | 4'-8½" | CPR | Steamtown National Historic Site, Scranton, PA | out of service | Montreal Locomotive Works #64541, 1923 | |
| 3713 | P-4 | 4-6-2 | 4'-8½" | B&M | Steamtown National Historic Site, Scranton, PA | restoration | Lima #7625, 1934 | |
| 502 (5313) | J-1 | 4-6-4 | 4'-8½" | TH&B (NYC) | Steamtown National Historic Site, Scranton, PA | display | ALCO, 1927 | steam generator car made from NYC Hudson tender 5313 |
| 47 (1542) | X-10-a | 4-6-4T | 4'-8½" | CNR (GTR) | Steamtown National Historic Site, Scranton, PA | display | Montreal Locomotive Works, 1914 | First locomotive to operate at Steamtown USA |
| 6039 | U-1-c | 4-8-2 | 4'-8½" | GTW | Steamtown National Historic Site, Scranton, PA | display | Baldwin #58463, 1925 | |
| 2124 | T-1 | 4-8-4 | 4'-8½" | Reading | Steamtown National Historic Site, Scranton, PA | display | Reading, 1946 | |
| 4012 | 48841 | 4-8-8-4 | 4'-8½" | UP | Steamtown National Historic Site, Scranton, PA | display | ALCO (Schenectady) #69583, 11/1941 | |
| 1 | | Shay2Tr | 4'-8½" | Meadow River | Steamtown National Historic Site, Scranton, PA | stored | Lima #2317, 1910 | in poor condition |