Reeta Sisko Hanhijoki, née Markkanen (born 25 April 1962 in Rautalampi) is a retired Finnish sprinter, who specialized in the 60, 100 and 200 metres.

[1] Domestically, she won 28 national championship titles in the 60, 100 and 200 metres indoor and outdoor between 1985 and 1993.

[7][8][9] At the 1989 European Indoor Championships she won the bronze medal in the 60 metres behind Nelli Fiere-Cooman and Laurence Bily.

[3] The hegemony in Finnish women's sprint was taken over by Sanna Kyllönen, née Hernesniemi.

Hanhijoki's personal best time in the 60 metres (indoor) was 7.20 seconds, achieved in February 1990 in Nice.