Nils Ole Nicklén (9 February 1917 – 9 May 1995) was a Finnish high jumper.
He was born in Karis (now part of Raseborg, Finland) and represented a club in Helsinki, where he also died. Nicklén is best known for winning the bronze medal at the 1946 European Athletics Championships in Oslo, with a jump of 1.93 metres. At the 1948 Summer Olympics in London, he competed in the high jump final but recorded no valid jumps (no-heighted). His personal best jump was 2.00 metres, achieved in 1939.
Nicklén was a six-time Finnish national champion in high jump (1940, 1943, 1945, 1946, 1949, and 1951).
