Izaak Herman Reijnders (Stadskanaal, 27 March 1879 – Den Haag, 31 December 1966) was the man in charge of the Dutch military high command just prior to the beginning of World War II when he was replaced with retired general Henri Winkelman after an argument with the minister of Defense Adriaan Dijxhoorn. He was a son of Izaäk Herman Reijnders and Antje Meursinge.