Ola Mosafinn (14 July 1828 – 28 December 1912) was a Norwegian Hardanger fiddle player and composer.
He was the youngest of five children born to Sjurd Brynjulvsson Liland (1792–1866) and Ingebjørg Klausdotter Mosafinn (1790–1852).
In the summer of 1872, crown prince and future King Oscar II of Sweden, made a trip to the west coast of Norway and Ola Mosafinn was invited to perform.
Later that summer, Mosafinn met famed Norwegian violinist and composer Ole Bull, who gave the fiddler praise.
During the summer of 1879, Norwegian composer Edvard Grieg visited Voss.