Hans Erik Dittmar (November 14, 1902 – June 20, 1967) was a Finnish sailor and olympic medalist.
He was born and died in Helsinki.
Dittmar competed at the 1924 Summer Olympics in Paris, where he received a bronze medal in the monotype class.In 1952 he was the helmsman of the Finnish boat Teresita which finished eighth in the 5.5 metre class competition.