Grunwald is a surname. Notable people with the surname include:
Al Grunwald, American baseball playerAnatole de Grunwald, Russian-British film producer and screen-writerAsh Grunwald, Australian blues singerGlen Grunwald, former GM of the Toronto RaptorsHenry Grunwald (editor), born Heinz Anatol Grünwald (1922–2005), U.S. journalist and diplomatLisa Grunwald, American authorLudwig Grünwald, (1863–1927), German otolaryngologistMichael Grunwald, American journalist, author of 'The Swamp' and 'The New New Deal'Wilhelm Grunwald, mathematician