Harry James Cargas (June 18, 1932 – August 18, 1998) was an American scholar and author best known for his writing and research on the Holocaust, Jewish–Catholic relations, and American literature. He was a professor at Webster University for nearly three decades, and his circle of friends and collaborators included the American novelist Kurt Vonnegut, Nobel Laureate and Holocaust survivor Elie Wiesel and sportscaster and humanitarian Bob Costas.