NEUBREISACH, a town and fortress of Germany in the imperial province of Alsace-Lorraine, situated on the Rhine-Rhone canal, 12 m. E. from Colmar by the railway to Freiburg-im-Breisgau. Pop. (1905—including a garrison of 2300 men) 3520. It is built in the form of a hectagon, and together with Fort Mortier, which lies on an arm of the Rhine opposite, forms a place of great strategic strength. It contains an Evangelical (garrison) church, a Roman Catholic church and a non-commissioned officers' school. There are electrical works in the town.
Neubreisach was founded by Louis XIV. in 1699 and fortified by Vauban, the Neubreisacher canal being constructed to transport the necessary materials. In the Franco-German War, it was bombarded by the Germans from the 2nd to the 10th of November 1870, when it capitulated.
See Wolff, Geschichte des Bombardements von Schlettstadt und Neubreisach (Berlin. 1874); and von Neumann, Die Eroberung von Schlettstadt und Neubreisach im Jahre 1870 (Berlin, 1876).