Dissanayaka Mudiyanselage Tharushi Dilsara Karunaratne (born 18 November 2004) is a Sri Lankan middle-distance runner who competes mainly in the 800 metres.

[5][6] Tharushi competed in the 100m and 200m events at her rural school's Inter-House Meet after her first coach, Pushpa Kumudini, noticed her talent.

Her abilities blossomed when she attended A. Rathnayake Central in Walala on a sports scholarship and was a member of the 4 × 400 m relay team that won the All-Island School Games in a record time in 2018.

It marked the first instance for Sri Lanka since 2002 (after 21 years) to win a gold medal in Asian Games Athletics event.

She was also part of the women's 400m relay team which secured bronze medal in 4 × 400 metres event at 2022 Asian Games by finishing at 3:30.88 minutes.