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. She won a bronze medal at the 1989 European Indoor Championships. Domestically, she won 28 national championship titles in the 60, 100 and 200 metres indoor and outdoor between 1985 and 1993.