Pitkänen is a Finnish surname. Notable people with the surname include:
Ilmari Pitkänen, (1880–1927), Finnish writer
Ilmari Pitkänen (born 1990), Finnish ice hockey player
Joni Pitkänen (born 1983), Finnish ice hockey player
Matti Pitkänen (born 1951), Finnish cross-country skier
Miikka Pitkänen (born 1996), Finnish ice hockey player
Paavo Pitkänen (1908–1993), Finnish writer
Pauli Pitkänen (1911–1941), Finnish cross-country skier
Petri Pitkänen (born 1991), Finnish ice hockey player
Riku Pitkänen (born 1991), Finnish ice hockey player
Toimi Pitkänen (born 1928), Finnish rower