WISMAR, a seaport town of Mecklenburg-Schwerin, Germany, on a bay of the Baltic, 18 m. N. of Schwerin; pop. in 1871, 13,883. It has an excellent harbor, over 50 registered vessels, a fine Gothic and five other churches, a new town hall, a gymnasium, a school of navigation, and other public buildings. Machinery, tobacco, and chiccory are the chief manufactures, and grain is the principal export. Wismar was one of the Hanse towns. Under the treaty of Westphalia of 1648 it was annexed to Sweden; in 1803 it was restored to Mecklenburg. The neighboring Wenndorff has been a watering place since 1867.