Billund Municipality is a kommune in the centre of the Jutland Peninsula in Denmark. Formerly the municipality belonged to Ribe County. The new, merged municipality covers an area of 540.18 km2, and has a total population of 27,168 (2025). Its mayor is Stephanie Storbank, a member of Venstre political party. The site of its municipal council is the town of Grindsted, which is the largest town in the municipality followed by the city of Billund.