Guy-Olivier Segond (14 September 1945 – 12 November 2020) was a Swiss politician. He was born in Geneva, Switzerland. He was a member of the FDP.The Liberals and Free Democratic Party. From 1983 to 1984 and again from 1988 to 1989, he was the Mayor of Geneva. Segond was a member of the National Council from 1987 to 1990.