Strijen is a town and former municipality in the western Netherlands, in the province of South Holland. The municipality, covering an area of 57.70 km2 (22.28 sq mi) of which 6.85 km2 (2.64 sq mi) is water, is located on the Hoeksche Waard island along the Hollands Diep estuary. On 1 January 2019 it was merged with the municipalities of Binnenmaas, Cromstrijen, Korendijk, and Oud-Beijerland to form the municipality of Hoeksche Waard.

Binnenmaas was a municipality in the western Netherlands, in the province of South Holland. The municipality had a population of data missing in 2021, and covers an area of 75.57 km2 (29.18 sq mi) of which 6.31 km2 (2.44 sq mi) is water. It is named after the lake of the same name.