The municipality of Maasdam was eventually merged with some surrounding municipalities to become part of the new municipality of Binnenmaas. The exception was Cillaarshoek which was split and partly merged into the existing municipality of Strijen.Ad van der Meer and Onno Boonstra, "Repertorium van Nederlandse gemeenten vanaf 1812", KNAW, 2nd Ed, 2011. On 1 January 2019 Binnenmaas was merged with Cromstrijen, Korendijk, Oud-Beijerland, and Strijen to form the municipality of Hoeksche Waard.Wet samenvoeging gemeenten Binnenmaas, Cromstrijen, Korendijk, Oud-Beijerland en Strijen, 11 July 2018, accessed at overheid.nl
