Tapani Niku (April 1, 1895 – April 6, 1989) was a Finnish cross-country skier who competed in the 1920's.
He was born in Haapavesi and died in Lathi.
Niku won a bronze in the 18 km event at the 1924 Winter Olympics in Chamonix. He also participated in the 50 km competition but did not finish.
At the FIS Nordic World Ski Championships 1926 he finished sixth in the 18 km event.