Philipp Friedrich Gmelin (19 August 1721 – 9 May 1768) was a professor of botany and chemistry.

He studied the chemistry of antimony and wrote texts on the pancreatic ducts, mineral waters, and botany.

He was a brother of the famous traveler Johann Georg Gmelin.

He obtained his Master's degree in 1742, at the University of Tübingen under Burchard Mauchart.

[citation needed] He was elected a Fellow of the Royal Society in 1758.