G
- Johan Gadolin, (1760–1852), Finnish chemist
- Merrill Garnett, (born 1930), American biochemist
- Joseph Louis Gay-Lussac, (1778–1850), French chemist and physicist, discovered the Gay-Lussac law
- Charles Frédéric Gerhardt, (1816–1856), French chemist, synthesized acetylsalicylic acid
- William Giauque, (1895–1982), 1949 Nobel Prize in Chemistry
- Josiah Willard Gibbs (1839–1903), American engineer, chemist and physicist
- Walter Gilbert, (born 1932), 1980 Nobel Prize in Chemistry
- Johann Rudolf Glauber, (1604–1670), Dutch-German alchemist and chemist
- Lawrence E. Glendenin, (1918–2008), American chemist, co-discovered the element promethium
- Leopold Gmelin, (1788–1853), German chemist, discovered potassium ferricyanide.
- Theodore Nicolas Gobley, (1811–1874), French chemist, pioneer in brain tissues analysis, discoverer of lecithin
- Victor Goldschmidt, (1888–1947) Father of Modern Geochemistry
- Moses Gomberg, (1866–1947), Russian-American chemist, known for pioneering work in radical chemistry
- David van Goorle also called Gorlaeus, (1591–1612), Dutch chemist, on of the first modern atomists
- Carl Gräbe, (1841–1927), German chemist, discovered the dye alizarin
- Thomas Graham, (1805–1869), Scottish chemist, dialysis and diffusion.
- Harry B. Gray, (born 1935), 2004 Wolf Prize in Chemistry
- Francois Auguste Victor Grignard, (1871–1935), 1912 Nobel Prize in Chemistry corecipient
- Robert H. Grubbs, (born 1942), 2005 Nobel Prize in Chemistry
Read more about this topic: List Of Chemists