Korneuburg (German pronunciation: [kɔʁˈnɔʏbʊʁk]) is a town in Austria. It is located in the state Lower Austria and is the administrative center of the district of Korneuburg. Korneuburg is situated on the left bank of the Danube, opposite the city of Klosterneuburg, and is 12 km northwest of Vienna. It covers an area of 9.71 square km and as of 2001 there were 11,032 inhabitants.
Korneuburg was originally a bank settlement associated with Klosterneuburg under the name Nivenburg. It was first mentioned in 1136, and in 1298 received the right to formal separation from Klosterneuburg.
In 1938, the shipyard Korneuburg was integrated into the Hermann-Göring-Werke, and significantly enlarged. In 1941, 16 barracks for Germans, forced laborers and prisoners of war were added. In 1945, the Red Army captured the shipyard.
The Korneuburg Shipyard is now the site of a branch of the Museum of Military History, Vienna comprising two patrol boats, Niederösterreich and Oberst Brecht. These were the Austrian Army's last patrol ships on the Danube, and the successors of the KuK Kriegsmarine .