The Baldwin DRS-4-4-1500 was a United States diesel-electric locomotive of the road switcher type rated at 1500 hp, that rode on two-axle trucks, having a B-B wheel arrangement. It was manufactured from 1947 until it was replaced in 1950 by the 1600 hp AS-16.

Nine railroads bought 35 locomotives, with five railroads later buying the successor model.

Railroad	Quantity	Road Numbers	Notes
Erie Railroad Erie Railroad The Erie Railroad was a railroad that operated in New York State, New Jersey, Pennsylvania, Ohio, Indiana, and Illinois, originally connecting New York City with Lake Erie...	6	1100–1105
Lehigh Valley Railroad Lehigh Valley Railroad The Lehigh Valley Railroad was one of a number of railroads built in the northeastern United States primarily to haul anthracite coal.It was authorized April 21, 1846 in the U.S. state of Pennsylvania and incorporated September 20, 1847 as the Delaware, Lehigh, Schuylkill and Susquehanna Railroad...	1	200
Iron Mines of Venezuela (Bethlehem Steel Company)	3	1–3
Minneapolis, St. Paul and Sault Ste. Marie Railroad Minneapolis, St. Paul and Sault Ste. Marie Railroad The Minneapolis, St. Paul and Sault Ste. Marie Railroad was a Class I railroad subsidiary of the Canadian Pacific Railway in the Midwest U.S. Commonly known as the Soo Line after the phonetic spelling of Sault, it was merged with several other major CP subsidiaries on January 1, 1961 to form the...  ("Soo Line")	8	360–367
Missouri Pacific Railroad Missouri Pacific Railroad The Missouri Pacific Railroad , also known as the MoPac, was one of the first railroads in the United States west of the Mississippi River. MoPac was a Class I railroad growing from dozens of predecessors and mergers, including the St. Louis, Iron Mountain and Southern Railway , Texas and Pacific...  (St. Louis, Brownsville and Mexico Railway St. Louis, Brownsville and Mexico Railway The St. Louis, Brownsville & Mexico Railway was a 200-mile railroad that operated from Brownsville, Texas to Gulf Coast Junction in Houston. It passed through small southeast Texas communities such as Robstown, Corpus Christi, Bay City, and Harlingen as well as the Rio Grande Valley.-History:Uriah... )	4	4112–4115
New York Central Railroad New York Central Railroad The New York Central Railroad , known simply as the New York Central in its publicity, was a railroad operating in the Northeastern United States...	2	7300–7301
Northern Pacific Railway Northern Pacific Railway The Northern Pacific Railway was a railway that operated in the west along the Canadian border of the United States. Construction began in 1870 and the main line opened all the way from the Great Lakes to the Pacific when former president Ulysses S. Grant drove in the final "golden spike" in...	2	175–176	Renumbered 500–501
Pennsylvania-Reading Seashore Lines Pennsylvania-Reading Seashore Lines Pennsylvania-Reading Seashore Lines was a railroad that operated in southern New Jersey in the 20th century. It was created as a joint venture of the Pennsylvania Railroad and the Reading Company .- History :...	6	6000–6005
Western Maryland Railway Western Maryland Railway The Western Maryland Railway was an American Class I railroad which operated in Maryland, West Virginia, and Pennsylvania. It was primarily a coal hauling and freight railroad, with a small passenger train operation. The WM became part of the Chessie System in 1973 and ceased operating its lines...	3	170–172
Total	35