UNNA, a town of Germany, in the Prussian province of Westphalia, 15 m. by rail E. of Dortmund, on the line to Hamm. Pop. (1905) 16,324. It has two Roman Catholic and two Protestant churches, a synagogue and several schools. Its chief industries are iron foundries, machine shops, salt works and breweries—other articles of manufacture being bricks and cement. In the middle ages Unna formed part of the electorate of Cologne. It received municipal rights in 1256 and was a member of the Hanseatic League.