August Friedrich Oelenhainz

August Friedrich Oelenhainz (June 28, 1745 – November 5, 1804) was a German painter.

He studied under his uncle Wolfgang Dietrich Mayr in Tübingen, and then later at the art school in Stuttgart with the Württemberg court painter Johann Wilhelm Beyer.

Oelenhainz moved to Vienna, where in the imperial court he rapidly became a popular painter.

In 1803 he traveled to Paris and on the way home died unexpectedly in 1804.

The painter Susette Hirzel studied briefly with Oelenhainz.