Mölnbo (Swedish pronunciation: [ˈmœ̌lnbʊ])[3] is a locality situated in Södertälje Municipality, Stockholm County, Sweden with 1,052 inhabitants in 2010.

After three successful festivals, there has been a break for some years, however Mölnbo Bio is still alive, and shows a new movie every Sunday.

Those who built the house was a group of radical agricultural labourers and workers at the nearby sawmill and at the marble quarry.

Other famous citizens from Vårdinge who have performed in Mölnbo Folkets Hus are Tora Dahl and Harry Martinsson.

An express railway station will also be built in Gnesta, which will simplify commuting to the centre of Södermanland, like for example Katrineholm and Flen.