The Age of Aquarius is the fourth album by the American pop group the 5th Dimension, released in 1969. It was the group's biggest commercial success in the United States, peaking at number two on the Billboard pop albums chart and the R&B albums chart.

Billy Davis Jr. - lead vocals (tracks 1, 8), background vocals
Florence LaRue - lead vocals (track 2), background vocals
Marilyn McCoo - lead vocals (tracks 2, 4), background vocals
Lamonte McLemore - background vocals
Ron Townson - background vocals

Dennis Budimir, Mike Deasy, Bill Fulton, Tommy Tedesco - guitar
Joe Osborn - bass
Hal Blaine - drums, percussion
Larry Bunker - mallets, congas, percussion
Milt Holland - percussion
Pete Jolly, Larry Knechtel, Jimmy Rowles - keyboards
Bill Holman - strings & brass - string section, horn section
Tony Terran - trumpet