Mariahilf is the 6th municipal district of Vienna, Austria (German: 6. Bezirk). It is near the center of Vienna and was established as a district in 1850. Mariahilf is a heavily populated urban area with many residential buildings. It has a population of 30,613 (2014-01-01) within an area of 1.48 square kilometres (0.6 sq mi).
Mariahilf is located southwest of Vienna's centre (1st district). In the north, Mariahilfer Straße, Vienna's most important shopping street, is its border with Neubau, in the south, the valley of the Vienna River, in the west, the Gürtel beltway.
It consists of the five neighbourhoods (historical Vorstädte, i.e. towns): Mariahilf, Gumpendorf, Windmühle, Magdalenengrund and Laimgrube.
First settlements around the Roman roads of the area developed around the year 1000. In 1428, the name Im Schöff is mentioned for the first time, but this name was lost when the copy of a sacral painting from Passau was installed in a chapel of the graveyard, which came to be known as Mariahilf ("Mary's help").