It was founded in 1938 as the National Marriage Guidance Council, after a clergyman, Herbert Gray, noted that the divorce rate was increasing. It adopted its current name on Valentine's Day 1988. In the 1990s, Relate's public profile increased after Princess Diana became its patron in 1989.
Today, Relate sees over 150,000 clients a year, at more than 600 locations across the UK.
In 2006, Relate opened the Relate Institute, the UK's first Centre of Excellence for the study of relationships, in partnership with Doncaster College and the University of Hull.