Taastrup is a Danish railway town and suburb of Copenhagen – 18 km west of Copenhagen's city centre. The town forms a twin urban area with neighbouring suburb Høje Taastrup, Taastrup rising since 1859 and Høje Taastrup rising west of the town, since the 1970s. The town/suburb development has engulfed the villages of Taastrup Valby, Høje Taastrup, Kragehave and Klovtofte, although Høje Taastrup still has a preserved village character around Høje Taastrup Church. The town is the administrative seat of Høje-Taastrup Municipality, Region Hovedstaden; the seat placed in Taastrup first and since moving to Høje- Taastrup in the beginning of the 1980s. In 2023 a new town hall was opened on 14 February.

Høje-Taastrup Municipality is a municipality in the Capital Region on the island of Zealand (Sjælland) in eastern Denmark. The municipality covers an area of 78 km2 (30 mi2), and has a total population of 55,258. It was formed by the 1970 Danish Municipal Reform, and its 1974 adjustment, by merging the parish municipalities of Høje Taastrup, Sengeløse, the Fløng part of Hvedstrup-Fløng and the Reerslev part of Reerslev-Vindinge. Since 1 January 2006 the mayor of the municipality has been Michael Ziegler, a member of the Conservative People's Party political party.