"One Man Woman" is a 1980 song recorded by Scottish singer Sheena Easton. Although was never released as a single in the United States, it was Easton's third single. The song was written by Mike Leeson and Peter Vale, and produced by Christopher Neil.
Following her launch on the TV show The Big Time, Easton shot to success during the summer of 1980 with two top ten hits; "9 to 5" and "Modern Girl". In October, the third single "One Man Woman" was released. It was also a success peaking at #14 in the UK and #5 in Ireland. The song was backed by the ballad "Summer's Over" on the B-Side. Like her previous two singles, this was again produced by Christopher Neil and recorded at AIR Studios in London. The song was later included on her debut album, Take My Time, released early the following year. The video for the single featured Easton during a photo shoot.
In November 1980, Easton was invited to appear at The Royal Variety Performance to sing for the Queen. Despite this song being currently in the charts at the time, Easton instead sung "When He Shines", a song from her upcoming album.