| 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 | At only 15 tons in weight, it's among the smallest standard gauge steam locomotives built. With its small size and an oilburner, it was designed to be operated by one person, primarily switching at Bridgeport, CT. Cosmetically restored. | |
| 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 | Once 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 | overhaul | Baldwin #60733, 1929 | From the Age of Steam Roundhouse, Sugarcreek, OH. Acquired in trade for CN 1551 in 1986. Restored to operation in the 1990s. Taken out of service in Dec 1999. Returned to operation in Dec 2015 just in time for the 2016 Railfest. Currently painted green. | |
| 6816 | 0-6-0F | 4'-8½" | PSE&G | Steamtown National Historic Site, Scranton, PA | display | H.K. Porter #6816, 1923 | Cosmetically restored in late 2023. | |
| 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 the Blackmount & Haverhill Railroad, North Haverhill, NH. | |
| 210 | 2-6-0 | 4'-8½" | Norwood & St. Lawrence | Steamtown National Historic Site, Scranton, PA | stored | Alco (Cooke) #65365, 1923 | ||
| 565 | 10c | 2-6-0 | 4'-8½" | DL&W | Steamtown National Historic Site, Scranton, PA | restoration | Alco (Schenectady) #45528, 1908 | From the Black River & Western Railroad, Flemington, NJ. Cosmetic restoration only. |
| 1 | 2-6-2 | 4'-8½" | Brooks Scanlon | Steamtown National Historic Site, Scranton, PA | display | Baldwin #41649, 1914 | ||
| 1923 | 2-8-0 | 4'-8½" | Lowville & Beaver River | Steamtown National Historic Site, Scranton, PA | stored | Alco (Cooke) #62623, 1920 | Appears to be in poor cosmetic condition and awaiting possible cosmetic restoration. | |
| 15 (20) | 10-34-E | 2-8-0 | 4'-8½" | Rahway Valley (Oneida & Western) | Steamtown National Historic Site, Scranton, PA | display | Baldwin #43529, 1916 | Once operated at Steamtown. Suffered boiler tube collapse while double heading with 2 G5s, damaging the front tube sheet. |
| 519 | W-1 | 2-8-0 | 4'-8½" | MEC | Steamtown National Historic Site, Scranton, PA | display | Alco (Schenectady) #52991, 1913 | Appears to be in poor cosmetic condition. |
| 790 | 2-8-0 | 4'-8½" | IC | Steamtown National Historic Site, Scranton, PA | display | Alco (Cooke) #28686, 1903 | 790 borrowed back by the Illinois Central after being sold for preservation after a sudden surge in traffic occurred. Later, it was overhauled for a planned tourist operation, but only ran one mainline trip out to Illinois. | |
| 3254 (2854) | S-1-b | 2-8-2 | 4'-8½" | CNR | Steamtown National Historic Site, Scranton, PA | display | CLC #1463, 1917 | From the Gettysburg RR, Gettysburg, PA. Acquired in trade for CP 1278 in 1987. Uses the tender of CN 3377. Retired from excursion service in December 2012 after "Santa Train" due to a bent frame. Will be replaced by B&M 3713. |
| 3377 (2977) | S-1-d | 2-8-2 | 4'-8½" | CNR | Steamtown National Historic Site, Scranton, PA | display | CLC #1582, 1919 | Previously used as a spare parts source for CN 3254. The tender is being used behind CN 3254. Moved into backshop. Had its asbestos removed and had its boiler evaluated in February 2023. Restoration candidate. |
| 759 | S2 | 2-8-4 | 4'-8½" | NYC&StL | Steamtown National Historic Site, Scranton, PA | display | Lima #8667, 1944 | Operated mainline excursions in the 1960s and 1970s. Retired from excursion service in 1977 due to frozen and cracked boiler flues. |
| 2929 | F1a | 4-4-4 | 4'-8½" | CPR | Steamtown National Historic Site, Scranton, PA | stored | CLC #1943, 1938 | Was cosmetically restored while in VT and awaiting possible cosmetic restoration again. It is the only streamlined steam locomotive in the collection and only standard gauge 4-4-4 in the USA. |
| 44 | P | 4-6-0 | 4'-8½" | NYC&StL | Steamtown National Historic Site, Scranton, PA | stored | Alco (Brooks) #38831, 1905 | Oldest surviving Nickel Plate Road locomotive. Appears to be in poor cosmetic condition and is awaiting possible cosmetic restoration. |
| 2317 | G3c | 4-6-2 | 4'-8½" | CPR | Steamtown National Historic Site, Scranton, PA | display | Montreal Locomotive Works #64541, 1923 | Taken out of service in late 2010. Currently displayed inside the roundhouse. Restoration status is unclear. |
| 3713 | P-4 | 4-6-2 | 4'-8½" | B&M | Steamtown National Historic Site, Scranton, PA | restoration | Lima #7625, 1934 | Named Constitution. Will replace CN 3254 in excursion service when the restoration to operation is complete. |
| 502 (5313) | J-1 | 4-6-4 | 4'-8½" | TH&B (NYC) | Steamtown National Historic Site, Scranton, PA | stored | Alco, 1927 | Steam generator car made from the tender of NYC Hudson 5313. |
| 47 (1542) | X-10-a | 4-6-4T | 4'-8½" | CNR (GTR) | Steamtown National Historic Site, Scranton, PA | stored | Montreal Locomotive Works, 1914 | First locomotive to operate at Steamtown USA. Appears to be in poor cosmetic condition and is awaiting possible cosmetic restoration. It is the only 4-6-4T locomotive in the 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 Shops, 1947 | Operated the Iron Horse Rambles excursions from 1959 to 1963. Piston rods cut. Cosmetically restored in 2019. |
| 4012 | 48841 | 4-8-8-4 | 4'-8½" | UP | Steamtown National Historic Site, Scranton, PA | display | Alco (Schenectady) #69583, 11/1941 | Underwent a cosmetic restoration between 2019 and 2021. Displayed on a curved track in front near the parking lot. |
| 1 | Shay2Tr | 4'-8½" | Meadow River | Steamtown National Historic Site, Scranton, PA | restoration | Lima #2317, 1910 | Cab collapsed due to weight of snow while in Vermont. Brought into the shops in 2025 to undergo cosmetic restoration but now is being restored back to operational condition for the 2027 season. |