Schenectady Locomotive Works
The Schenectady Locomotive Works built railroad locomotives from its founding in 1848 through its merger into American Locomotive Company in 1901.
After the 1901 merger, Alco made the Schenectady plant its headquarters in Schenectady, New York.
One of the better-known locomotives to come out of the Schenectady shops was Central Pacific Railroad type 4-4-0 No. 60, the Jupiter, one of two steam locomotives to take part in the "Golden Spike Ceremony" to celebrate the completion of the First Transcontinental Railroad.
Preserved Schenectady locomotives
Following is a list of preserved Schenectady locomotives built before the Alco merger. All locations are in the United States unless otherwise noted.| Serial no. | Type | Build date | Operational owner | Disposition |
| 2409 | 0-6-0 | Outer Harbor Terminal Railway #2 | Los Angeles County Fairplex, Pomona, California | |
| 3114 | 2-8-0 | Southern Railway #154 | Gulf and Ohio Railways, Knoxville, Tennessee She is operational | |
| 4552 | 4-6-0 | Indiana Harbor Belt Railroad #15 | abandoned in the Maine North Woods following Eagle Lake and West Branch Railroad service | |
| 4807 | 4-8-0 | Southern Pacific Railroad #2914 | Kern County Museum, Bakersfield, California | |
| 5007 | 4-6-0 | Rio Grande Southern Railroad #20 | Colorado Railroad Museum, Golden, Colorado being restored to operation | |
| 5103 | 2-6-0 | Acadia Coal Company #42 | Museum of Industry, Stellarton, Nova Scotia, Canada | |
| 5129 | 2-8-0 | Northern Pacific Railway #25 | Civic Center, Butte, Montana | |
| 5613 | 4-4-2 | Chicago and North Western Railway #1015 | National Museum of Transport, Kirkwood, Missouri | |
| 5680 | 2-6-0 | Southern Pacific Railroad #1629 | Newhall, California | |
| 5683 | 2-6-0 | Southern Pacific Railroad #1673 | Southern Pacific Depot, Tucson, Arizona |