Hiruni Wijayaratne (born December 5, 1990) is a Sri Lankan-American track and field athlete, specializing in long distance running events. She is considered the most decorated Sri Lankan distance athlete, as she holds eleven Sri Lankan national records for road and track events as of 2019. These include the women's 10,000 metres and marathon. Hiruni represented Sri Lanka in the 2017 London marathon at the 2017 World Championships in Athletics. In 2019, she competed in the women's marathon at the 2019 World Athletics Championships held in Doha, Qatar. She did not finish her race.