Gottfried Christoph Beireis (2 March 1730 – 18 September 1809) was a German chemist and doctor.

He was also a collector of curiosities who rescued some of Jacques de Vaucanson's automata.

He taught anatomy, medicine, surgery, chemistry, botany, natural history, pharmacy, mineralogy, metallurgy, agriculture, forestry, music, painting, and numismatics.

[citation needed] As a student, he discovered a way to convert ammonium sulfide to cinnabar and made a fortune selling the latter as a red dye.

[citation needed] Beireis was a student of Georg Erhardt Hamberger's in Jena in 1753.