Lagasse or Lagassé is a surname. Notable people with the surname include:
Bob Lagassé, Canadian politician Emeril Lagasse (born 1959), American celebrity chef Jan Lagasse, American curler Janet Lagasse, American tennis player Jeannette Boudreault-Lagassé (1941–2006), Canadian writer Louis Lagassé (born 1947), Canadian businessman= Scott Lagasse (born 1959), American racing driver Scott Lagasse Jr. (born 1981), American racing driver Tim Lagasse (born 1969), American puppeteer
See also Lagbas