Mönichkirchen is a market town in the district of Neunkirchen, in the south of the Austrian state of Lower Austria. It lies in the eastern part of the country, within the district that surrounds the town of Neunkirchen.
The town had a population of 607 inhabitants as of 1 January 2013. As a market town (Marktgemeinde), it holds that legal status within Austria's municipal structure.