Loevestein Castle is a medieval castle in the municipality of Zaltbommel, Gelderland, the Netherlands.
The castle was built by the knight Dirc Loef van Horne between 1357 and 1397. Until World War II Loevestein Castle was part of the Hollandic Water Line, the main Dutch defense line that was based on flooding an area of land south and east of the western provinces. Currently the castle is used as a medieval museum and function centre.