Wanner is a surname. Notable people with the surname include:
Bob Wanner (born 1949), Canadian politician Erich Wanner (born 1969), Swiss gymnast Florian Wanner (born 1978), German judoka Gerhard Wanner (born 1942), Austrian mathematician Heinz Wanner (born 1945), Swiss geographer and climate researcher Ines Wanner (born 2000), German field hockey player Jack Wanner (1885–1919), Major League Baseball player Jakob Friedrich Wanner (1830–1903), German-born Swiss architect Jannik Wanner (born 1999), German footballer Léo Wanner (1886–1941), French communist and anti-imperialist activist Markus Wanner (born 1973), Swiss footballer Max Wanner (born 2003), Canadian ice hockey player Paul Wanner (born 2005), Austrian footballer Rudolf Wanner (born 1951), Austrian ski jumper Zukiswa Wanner (born 1976), South African journalist and novelist