Karl Gottfried Erdmann (31 March 1774 – 13 January 1835) was a German physician and botanist. He was the father of chemist Otto Linné Erdmann (1804–1869).
Erdmann was born in Wittenberg. In 1798 he received his medical doctorate from the University of Wittenberg with the dissertation "De nexu theoriam et praxin medicam intercedente". In 1799 he became a licensed physician in Dresden, and up until 1824 he held the position of sanitation assessor. He is credited for introducing vaccinations for smallpox in Dresden in 1801.[1][2] He died in Dresden, aged 60.