Johannes Hermanus Barend Koekkoek (July 6, 1840, Amsterdam - January 24, 1912, Hilversum) was a Dutch artist. He was the son of artist Hermanus Koekkoek, brother of Barend Cornelis Koekkoek.
Koekkoek started painting in the romantic tradition of his father but after 1864 he changed his style to a kind of realism, under influence of the Hague School.