Jan Gunnar Hoff (born 22 October 1958) is a Norwegian jazz pianist, composer, arranger and professor, living in Bodø, known from cooperations with jazz musicians like Pat Metheny, Mike Stern, Alex Acuña, Audun Kleive, Mathias Eick, John Surman, Karin Krog, Maria João, Marilyn Mazur, Anders Jormin, Arve Henriksen, Per Jørgensen, Tore Brunborg, Bjørn Kjellemyr, Ernst-Wiggo Sandbakk, Per Mathisen, Gary Novak, Arild Andersen, Tore Johansen, Nils Petter Molvær, Ståle Storløkken, Gary Husband a.o.

He is a graduate of the Teachers' College in Bodø and Bergen, and was further educated in the Jazz program at Trondheim Musikkonservatorium under Terje Bjørklund (1986–89), and in composition at Norges Musikkhøgskole (2001).

In 2005 he received the prestigious Edvard-prize (named after Edvard Grieg) for his jazz mass Meditatus and the same year he wrote the commission work for Vossajazz.

Hoff's quartet album Fly North with Marilyn Mazur, Anders Jormin and Arve Henriksen was nominated for the Norwegian Grammy, Spellemannpris 2014.

Jan Gunnar Hoff has performed in Los Angeles, New York, London, Zagreb, Milano, St. Petersburg, Moscow, Kyiv, Stockholm, Istanbul, Havana, Riga and other major cities.