Hagestein is a small town in the municipality of Vijfheerenlanden, Utrecht, Netherlands, on the Lek River, about 2 km east of Vianen. It received city rights in 1382 but was demolished in 1405.
Hagestein was a separate municipality between 1818 and 1986, when it merged with Vianen. Until 2002, it was a part of the province of South Holland.