Joseph Gottfried Mikan (3 September 1743 – 7 August 1814) was an Austrian-Czech botanist born in Böhmisch-Leipa (Česká Lípa).
He was the father of zoologist Johann Christian Mikan (1769-1844).
He was a student in Dresden, Prague and Vienna, and served as a spa physician in Teplice.
He was the author of Catalogus plantarum omnium (1776), which he dedicated to the botanical garden in Prague.
The plant genus Mikania from the family Asteraceae is named after him.