Mari Kalkun (born April 1, 1986) is an Estonian singer and musician who specializes in contemporary folk music. She has performed at home and abroad with the ensemble Runorum, releasing several recordings since 2007. In 2013, she was voted the best singer at Estonia's Ethno Music Awards. Her widely acclaimed 2018 album Ilmamõtsan consists of the songs inspired by Estonian traditional folk music, especially that from the villages of Kalkun's native Võru in south-eastern Estonia.