Överkalix Municipality (Överkalix kommun, Ylikainuun kunta) is a municipality in Norrbotten County in northern Sweden. Its seat is located in Överkalix.
In 1870 a part of old Överkalix Municipality was detached from it, forming a municipality called Korpilombolo (now in Pajala Municipality). The municipality was not affected by the two subdivision reforms of the 20th century.
The coat of arms was designed in 1944 and based on the arms of the parish. Its exact meaning is not known, but many northern arms feature bears, reindeer or other animals.
Överkalix Municipality is situated along the south-going Kalix River. The unmodified scenic nature along the river attracts tourists and fishers every year. Within the municipality one also finds two of the river's most powerful waterfalls, Jockfall (9 metres fall) and Linafall (16 metres fall).
Continuing north along the Kalix River one finds the iron ore mines. Travelling south towards the coast one finds larger towns, w