James Messina is an American musician, songwriter, singer, guitarist, recording engineer, and record producer. He was a member of the folk rock group Buffalo Springfield, a founding member of the pioneering country rock band Poco, and half of the soft rock duo Loggins and Messina with Kenny Loggins.

Buffalo Springfield was a rock band formed in Los Angeles by Canadian musicians Neil Young, Bruce Palmer and Dewey Martin and American musicians Stephen Stills and Richie Furay. The group, widely known for the song "For What It's Worth", released three albums and several singles from 1966 to 1968. Their music combined elements of folk music and country music with influences from the British Invasion and psychedelic rock. Like contemporary band the Byrds, they were key to the early development of folk rock. The band took their name from a steamroller parked outside their house.