Roskilde Municipality (Danish: Roskilde Kommune) is a kommune in the Region Sjælland, 30 km west of Copenhagen on the island of Zealand in east Denmark.

The biggest city is Roskilde, the municipality covers an area of 212 km2, and it has a total population of 90,931 (2024).

Neighboring municipalities are Egedal to the northeast, Greve and Solrød to the southeast, Høje-Taastrup to the east, Køge to the south and Lejre to the west.

The town hall is situated in the city of Roskilde, at Køgevej 80.

The ten largest urban areas in the municipality are: Companies with headquarters in Roskilde municipality Roskilde's municipal council consists of 31 members, elected every four years.