Hans Conrad Schellenberg (28 April 1872 – 27 October 1923) was a Swiss botanist and agronomist.

He studied at the Eidgenössisches Polytechnikum Zürich (1890–93) and the University of Berlin (1893–95), where he was a student of botanist Simon Schwendener.

Afterwards he worked as an assistant at the seed control station in Zürich (1895–97) and as a teacher at the Agricultural School-Strickhof in Oberstrass (1897–1902).

He obtained his habilitation for botany at the Polytechnic in Zürich, where from 1908 to 1923, he served as a professor of agronomy.

[1][2] His primary focus was in the areas of plant pathology and agricultural botany, being credited with furthering the development of grain farming in Switzerland.