Aeugst am Albis is a municipality in the district of Affoltern in the canton of Zürich in Switzerland .

Aeugst am Albis is first mentioned in 876/877 as Ousta. In 1277 it was mentioned as Oeugsten.

Aeugst am Albis has an area of 7.9 km2 (3.1 sq mi). Of this area, 52.7% is used for agricultural purposes, while 31.3% is forested. Of the rest of the land, 11.6% is settled (buildings or roads) and the remainder (4.5%) is non-productive (rivers, glaciers or mountains).