A separate local government entity named Årjäng was created in 1941 when it was detached from Silbodal.

In 1974 Töcksmark was added, expanding the municipality to its current size.

Known Swedish sportsmen from this municipality are Per-Gunnar Andersson and Thomas Wassberg.

This is a demographic table based on Årjäng 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 9,936 residents, including 6,896 Swedish citizens of voting age.