Charles Henry Herbert Cook (30 September 1843–21 May 1910) was an English-born, Australian-raised, New Zealand-based mathematician. He was born in Kentish Town, Middlesex, England on 30 September 1843, but educated in Melbourne, Australia, where he got a BA and an LLB from University of Melbourne. He then went to St John's College, Cambridge, initially to train for the English Bar but became interested in mathematics. Cook was evidently a sound mathematician and an excellent teacher along orthodox lines, with no marked tendency to stray from those lines.