The northern part of the municipality was before 1925 part of Karlskoga Municipality, from which it was detached to form a new entity. It became a market town (köping) in 1943. In 1967 it was amalgamated with a part of the dissolved Svartå Municipality.
Demographics
This is a demographic table based on Degerfors Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.[3]
In total there were 7,456 Swedish citizens of voting age resident in the municipality.[3] 53.6% voted for the left coalition and 45.0% for the right coalition. Indicators are in percentage points except population totals and income.