Walter MacEwen (13 February 1860, Chicago - 20 March 1943, New York City) was an American painter.
From 1884 to 1914, he often lived and worked in the Netherlands.
He is considered to have been a member of the Egmondse School, named after the mostly American artists' colony near Egmond aan Zee.
He was the son of a merchant and entrepreneur of Scottish origin.