Ringsted Municipality is a kommune in the Region Sjælland on the island of Zealand in east Denmark. The municipality covers an area of 295 km2, and has a total population of 35,906 (2023). Its mayor is Henrik Hvidesten, a member of Venstre.

Zealand at 7,031 km2 is the largest and most populous island in Denmark proper. Zealand had a population of 2,319,705 on 1 January 2020, comprising 40% of the country's population.