The Houtribdijk is a dam in the Netherlands, built between 1963 and 1976 as part of the Zuiderzee Works, which connects the cities of Lelystad and Enkhuizen. On the west side of the dike is the Markermeer and on the east is the IJsselmeer. The 26-kilometer-long dike was intended for the Markerwaard, but the construction of this polder was abandoned in 2003 due to environmental concerns. The Houtribdijk was widened and reinforced between 2017 and 2020.