Neustadt District, West Prussia

Due to the continuous growth of the population in the 19th century, some districts in West Prussia turned out to be too large and a downsizing appeared to be necessary.

After World War I, due to the provisions of the Versailles Treaty, almost the entire Neustadt district had to be ceded by the German Reich on January 10, 1920.

A strip of territory west of Lake Żarnowiec with the municipality of Kniewenbruch remained in Germany and became part of the Lauenburg district in the Province of Pomerania.

In the Second Polish Republic, the city of Neustadt was renamed Wejherowo, after its founder Jakub Wejher.

In the German Empire, the districts of Neustadt, Karthaus and Putzig formed the Reichstag constituency of Danzig 4.