The Quart Festival was an annual popular music festival that took place in Kristiansand, Norway in the beginning of July, from 1991 to 2008. It was the most visited music festival in Norway.
It was first named Qvadradurmusivalen in 1991, but changed into the more ear-catching Quart Festival the following year. For several years Quart was the largest music festival in Norway, but went bankrupt in 2008 in part due to tough competition from the Hovefestivalen in Arendal and some Oslo-based festivals.