Jim Messina (born James Melvin Messina, December 5, 1947, Maywood, California) was a member of Buffalo Springfield, then an original member of the country rock band Poco, before he joined with Kenny Loggins to form the soft rock duo, Loggins and Messina.
While with Buffalo Springfield, he served as a recording engineer, producer, and eventually as a bass player (he replaced Bruce Palmer) on their last album.
Messina and Richie Furay, another Buffalo Springfield member, formed Poco after Buffalo Springfield broke up. Messina played lead guitar and supplied vocals and some songwriting to the band. After recording two studio albums and one live album, he left Poco.