Wietmarschen is a unitary community ("Einheitsgemeinde") in the County of Bentheim in Lower Saxony, Germany. It is split into the villages of Wietmarschen, Füchtenfeld, Schwartenpohl, Lohnerbruch, Nordlohne and Lohne with Lohne being the biggest and having the town hall while Wietmarschen, which is the second biggest, having the name.