Stephen Lord (born 1949) is an American conductor, specialising in opera. Raised in Massachusetts, he is a 1971 graduate of Oberlin College.
In 1980, Lord joined Opera Theatre of Saint Louis (OTSL) as its head of music staff. He was named as artistic advisor to OTSL general director Richard Gaddes in 1983. In 1986, Lord made his formal OTSL conducting debut, and in 1991, became music director of OTSL. In November 2015, OTSL announced that Lord is to stand down from the OTSL music directorship after the 2017 season, and to take the title of music director emeritus.
Lord was music director and principal conductor at Boston Lyric Opera from 1991 to 2008. From 2011 to 2015, he was artistic director of the opera studies department at the New England Conservatory of Music. In November 2016, Michigan Opera Theatre (MOT) named Lord to the newly created position of principal conductor of MOT, with an initial contract through the 2018-2019 season, with immediate effect.