Joakim Jan Aril "Jack" Berntsen (14 October 1940 – 5 October 2010) was a Norwegian philologist, songwriter and folk singer. He was born in Kjøpsvik, Tysfjord. He grew up in Hamarøy, and resided in Svolvær from 1968. He was awarded the prize Sølvharpa in 1975 by Dag og Tid, the county Nordland's cultural prize in 1981, the Elias Blix Prize in 1982, and the Prøysen Prize in 1985. A statue of Berntsen is placed in Svolvær. In 2000, a cultural prize, Jack Berntsens kulturpris, was established by the municipality Vågan.