| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Builder Info | Notes |
|---|---|---|---|---|---|---|---|---|
| 9 (616) | 0-6-0 | 4'-8½" | SMS Rail Lines (USATC) | SMS Rail Lines, Bridgeport, NJ | operational | Alco (Schenectady) #70402, 1942 | From the New Hope Railroad, New Hope, PA. Previously operated in the 1970s. Had the boiler fired up and the throttle opened with steam running through the cylinders in 2021. Restored back to operation on November 16, 2023. | |
| 844 (8444) | FEF-3 | 4-8-4 | 4'-8½" | UP | UP engine house, Cheyenne, WY | operational | Alco (Schenectady) #72791, 12/1944 | Featured in the TV series 'Shining Time Station'. Only steam locomotive in the United States to never be retired by a major class I North American railroad. Renumbered to 8444 from 1962 to 1989. Taken out of service in 2013. Returned to service in 2016. |
| 4014 | 48841 | 4-8-8-4 | 4'-8½" | UP | UP engine house, Cheyenne, WY | operational | Alco (Schenectady) #69585, 11/1941 | From Pomona, CA. Reacquired by the Union Pacific in July 2013. Restored to operation on May 1, 2019. Converted to burn oil. Temporarily uses the tender of UP 3985. Became the first-ever steam locomotive to be equipped with Positive Train Control. |
| 473 | K-28 | 2-8-2 | 36" | D&S (D&RGW) | Durango & Silverton, Durango, CO | operational | Alco (Schenectady) #64984, 1923 | Appeared in Love Those Trains. Damaged by a runaway truck on June 25, 1987. Converted to burn oil in late May 2021. Suffered a piston failure on September 25, 2021. |
| 476 | K-28 | 2-8-2 | 36" | D&S (D&RGW) | Durango & Silverton, Durango, CO | operational | Alco (Schenectady) #64987, 1923 | Restored to operation in 1981. Previously operated in Sep 1999. Restored back to operation in Feb 2018. Taken out of service in late Dec 2021. Returned to operation and converted to burn oil on May 25, 2022. |
| 25 | 2-6-2 | 4'-8½" | MCR | Oregon Coast Scenic Railroad, Garibaldi, OR | operational | Alco (Schenectady) #66435, 1925 | From the McCloud Railway Co., McCloud, CA. Appeared in 'Stand By Me' (1986 movie). Taken out of service in early January 2023. Returned to operation on July 18, 2024. | |
| 20 | T-19 | 4-6-0 | 36" | RGS (F&CC) | Colorado Railroad Museum, Golden, CO | operational | Alco (Schenectady) #5007, 1899 | From Alamosa, CO. Restored to operation in July 2020. Operated at the C&TS from late August to early October 2021. |
| 1003 | L-1 | 2-8-2 | 4'-8½" | MSP&SSM | Wisconsin Automotive Museum, Hartford, WI | operational | Alco (Schenectady) #52826, 1913 | Appeared in "Extreme Steam : Classic North American Steam Locomotives". |
| 20 (80) | 2-8-2 | 36" | SVRY (WP&Y) | Sumpter Valley Railway, McEwen, OR | operational | Alco (Schenectady) #61980, 1920 | Purchased by the Sumpter Valley Railroad for restoration in 1977. Retured to operation in 1996. Taken out of service in 2015. Restored back to operation in 2025. | |
| 19 (81) | 2-8-2 | 36" | SVRY (WP&Y) | Sumpter Valley Railway, McEwen, OR | operational | Alco (Schenectady) #61981, 1920 | Restored to operation in 1996. Taken out of service in Late September 2021. Undergoing mandated 1,472-day inspection and overhaul. Returned to operation in 2024. | |
| 261 | S-3 | 4-8-4 | 4'-8½" | CMStP&P | GN Shops/Minneapolis Junction, Minneapolis, MN | operational | Alco (Schenectady) #71974, 07/1944 | Restored to operation in 1993. Taken out of service in 2008. Returned to operation on December 12, 2012. Considering a possible conversion to burn oil, according to a March 2021 feasibility study. |
| 165 | S-34 | 0-6-0 | 4'-8½" | WP | Western Pacific Railroad Museum, Portola, CA | operational | Alco (Schenectady) #58787, 1919 | From the Pleasanton Fairgrounds, then PLA. Restored to operation on April 23, 2022. Debuted in excursion service on May 15, 2022. Currently the only operational WP steam locomotive. |
| 3 | 2-6-2T | 4'-8½" | Robert Dollar | Niles Canyon Railway, Sunol, CA | operational | Alco (Schenectady) #67544, 11/1927 | Traded to PLA from the Western Railway Museum, Suisun City, CA. |