August Horch (12 October 1868 – 3 February 1951) was a German engineer and automobile pioneer, the founder of the manufacturing giant that eventually became Audi.

Horch left the company in 1909 after a dispute, and set up in competition in Zwickau.

He published his autobiography, I Built Cars (Ich Baute Autos) in 1937.

He also served on the board of Auto Union, the successor to Audi Automobilwerke GmbH he had founded.

Horch remained an honorary executive at Auto Union during and after its reincorporation in Ingolstadt, Bavaria in the late 1940s until his death in 1951, ultimately not living to see the later resurrection of his Audi brand a decade later under the ownership of Volkswagen.