Julius Berend Cohen FRS[1] (6 May 1859 in Eccles – 14 June 1935 in Coniston) was an English chemist.

Julius Berend Cohen and his twin brother Adolf were the only boys of ten children of Sigismund Cohen, a cotton merchant born in Hamburg, and Zena, née Berend, from South Shields, who were married in Manchester.

[1] After an unhappy spell in industry at the Clayton Aniline Company, Cohen joined Smithells in moving to Baeyer's laboratory in Munich in 1882, where he worked with Hans von Pechmann.

When the college gained full university status in 1904, Cohen was appointed professor of organic chemistry.

They had a son, Colin James, who married Mary Cohen, the elder daughter of Julius and Hilda, in 1918.