Felix Jacob Marchand (22 October 1846 – 4 February 1928) was a German pathologist born in Halle an der Saale.

He studied medicine in Berlin, and later became an assistant at the pathological institute in Halle. In 1881 he became a professor of pathological anatomy in Giessen, and two years later garnered the same position at Marburg. In 1900 he succeeded pathologist Felix Victor Birch-Hirschfeld (1842-1899) at the University of Leipzig.

In 1904 Marchand is credited with coining the term atherosclerosis from the Greek "athero", meaning gruel, and "sclerosis", meaning hardening, to describe the fatty substance inside a hardened artery. His name is lent to the eponymous "Marchand's adrenals", which is accessory adrenal tissue in the broad ligament of the uterus.

Among his written works was a 4-volume textbook on pathology that he co-authored with Ludolf von Krehl (1861-1937), called "Handbuch der allgemeinen Pathologie".^[1]