USRA Light Santa Fe
Image:USRA [Light Santa Fe diagram.jpg|thumb|General arrangement drawing]
The USRA Light Santa Fe was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. These locomotives were of 2-10-2 wheel arrangement in the Whyte notation, or 1′E1′ in UIC classification; this arrangement was commonly named "Santa Fe" in the United States. At the time, the Santa Fe was the largest non-articulated type in common use, primarily in slow drag freight duty in ore or coal service.
A total of 94 of these locomotives were constructed under the auspices of the USRA. They went to the following railroads:
| Railroad | Quantity | Class | Road numbers | Notes |
| Ann Arbor Railroad | 4 | L | 190–193 | Built in 1919 by Baldwin All scrapped between 1945-1957. |
| Chicago and Western Indiana Railroad | 5 | 20-24 | Built 1918 by ALCO. All scrapped between 1950-1955. | |
| Duluth, Missabe and Northern Railway | 10 | E-1 | 506–515 | Built 1919 by Brooks Works Scrapped between 1952-1954. One example preserved. |
| New York Central Railroad subsidiary Boston and Albany Railroad | 10 | Z-1 | 1100–1109 | Built 1919 by ALCO-Brooks All scrapped between 1955-1961. |
| Seaboard Air Line Railroad | 15 | B-1 | 485–499 | Built 1919 by Baldwin All scrapped between 1950-1953. |
| Southern Railway | 50 | Ss-1 | 5200–5249 | Built 1918 by ALCO. All scrapped between 1949 - 1952. |
| Total | 94 |
Only one USRA Light 2-10-2 survives: DM&IR 506 is on display at the National Railroad Museum in Green Bay, Wisconsin