Godfrey Charles Joseph Isaacs (22 July 1866 – 17 April 1925) was a British businessman, and brother of the politician Rufus Isaacs, 1st Marquess of Reading. He was born in England and educated at the Leibniz University Hannover and Free University of Brussels. He then entered his father’s firm of fruit and ship brokers. In 1910 he became Managing Director of Marconi's Wireless Telegraph Company. He retired from the Marconi Company in November 1924, and died in 1925 aged only 58, which the Times obituary attributed to overwork.