Electro-Motive Diesel
| Formerly | 
 | 
|---|---|
| Company type | Subsidiary | 
| Industry | Transport | 
| Founded | August 31, 1922, in Cleveland, Ohio, United States | 
| Founder | 
 | 
| Headquarters | , United States | 
| Products | Locomotives | 
| Number of employees | 3,260 (2008) | 
| Parent | 
 | 
Electro-Motive Diesel (abbreviated EMD) is a brand of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. Formerly a division of General Motors, EMD has been owned by Progress Rail since 2010. Electro-Motive Diesel traces its roots to the Electro-Motive Engineering Corporation, founded in 1922 and purchased by General Motors in 1930. After purchase by GM, the company was known as GM's Electro-Motive Division. In 2005, GM sold EMD to Greenbriar Equity Group and Berkshire Partners, and in 2010, EMD was sold to Progress Rail, a subsidiary of the heavy equipment manufacturer Caterpillar. Upon the 2005 sale, the company was renamed to Electro-Motive Diesel.
EMD's headquarters and engineering facilities are based in McCook, Illinois, while its final locomotive assembly line is located in Muncie, Indiana. EMD also operates a traction motor maintenance, rebuild, and overhaul facility in San Luis Potosí, Mexico.
As of 2008, EMD employed approximately 3,260 people, and in 2010 it held only 30% of the market for diesel-electric locomotives in North America. Their only significant competitor is Wabtec-owned GE Transportation, which holds the remaining 70% market share of the North American market.