Antti Olavi Loikkanen (born 15 April 1955 in Enonkoski, Etelä-Savo) is a Finnish former middle-distance and endurance runner.

His best result in outdoor track competitions was a 5th place in the 1500 metres race in the 1978 European Championships in Athletics in Prague.

In the 1978 European Indoor Championships in Athletics in Milan, Loikkanen won gold with a national record time of 3:38.16.

Loikkanen also participated in the Olympic Games in Montreal 1976, Moscow 1980 and Los Angeles 1984 and in the 1983 World Championships in Athletics in Helsinki.

In 1500 metres Loikkanen ran on June 16, 1980, at Imatra, Finland in 3:36.3, which remains a Finnish record.