), Josefstadt is the smallest district in Vienna, and was named after the Holy Roman Emperor Joseph I.

It consists of the former Vorstädte of Josefstadt, Breitenfeld, Strozzigrund, and Alt-Lerchenfeld, as well as parts of St. Ulrich and Alservorstadt.

The district borders are formed by Alser Straße (north), Lerchenfelderstraße (south), Hernalsergürtel and Lerchenfeldergürtel in the west, and Auerspergstraße and Landesgerichtsstraße in the east.

The Alser Bach (now led under the Lazarettgasse) and the Ottakringer Bach (today between Lerchenfelder Street and Neustiftgasse), before the construction, had dug deep valleys with a partially strong gap in the area, resulting in significant differences in height within the district areas.

The north of the Josefstädter Street and the southeastern area of the territory belongs to the sub-district Josefstadt.

Included is the Strozzigrund in the west and east of Altlerchenfeld, where in the Pfeilgasse, several student residences are located.

The 2007 ORF comedy drama series Mitten im 8en ("In the middle of the 8th") was set in Josefstadt, with the title referencing to it being the 8th district of Vienna.