|Headquarters of the administration||Nørre Jernløse|
|Municipality since 2007||Holbæk Municipality|
Jernløse Kommune was until December 2006 a Danish municipality in what was then Vestsjællands Amt in the north-west of the main Danish island of Zealand . Since January 2007 it has been part of the new Holbæk municipality together with the former municipalities of Holbæk , Svinninge , Tornved and Tølløse . In addition to the then administrative seat Nørre Jernløse , the municipality included the places Regstrup , Sønder Jernløse , Kvanløse , Undløse and Søstrup .