Magne Havnå (16 September 1963 – 29 May 2004) was a Norwegian professional boxer who once held the WBO world title in cruiserweight, beating American boxer Boone Pultz in 5 rounds in May 1990.
His son Kai Robin Havnaa is also a former boxer in the cruiserweight division, undefeated as a professional.
After boxing in the 1984 Summer Olympics, Havnå turned pro in 1986.
His first fight was a 4-round decision over the UK's Johnny Nelson, who later on also became a world champion.
Havnå died in May 2004 in Lindgrov, Risør, Aust-Agder in a boat accident at the age of 40.