Ter Apel Monastery (Dutch: Klooster Ter Apel) is a former monastery in the village of Ter Apel in the northeastern Dutch province of Groningen. It is the only monastery in the larger area of Friesland and Groningen that survived the Reformation in a decent condition, and the only remaining rural monastery from the Middle Ages in the Netherlands. The convent buildings house a museum for monastery and church history and for religious art, as well as two contemporary art galleries. The former lay church of the monastery still functions as a reformed church.