A motorman is the person who operates an electrified trolley car, tram, light rail, or rapid transit train.

The term refers to the person who is in charge of the motor (of the electric car) in the same sense as a railroad engineer is in charge of the engine. The term was (and, where still used, is) gender-neutral. Though motormen have historically been male, females in the position (such as in the U.S. during the World Wars) were usually also called motormen as a job title.

The term has been replaced by more neutral ones, both as social nomenclature has changed and because many systems employ large numbers of women in the position. On the New York Subway, the position is now called train operator (T.O.), but it is still called motorman in Chicago.

The operator of an electric locomotive or an electric multiple unit train on a commuter or mainline railroad is typically called an engineer.