August von Hayek (14 December 1871 – 11 June 1928) was an Austrian physician and botanist born in Vienna.

Beginning in 1922, he taught classes at the Hochschule für Bodenkultur in Vienna, and from 1926, he was an associate professor at the university.

He is remembered for phytogeographical investigations that took place within the Austria-Hungarian Empire, in particular, Styria and the Balkans.

He also conducted detailed studies on the historical development of flora found along the eastern and southeastern edge of the Alps.

In the field of plant systematics, he specialized in Centaurea species native to Austria-Hungary.