Earnest Sevier Cox (January 24, 1880 – April 26, 1966) was an American Methodist preacher, political activist and white supremacist. He is best known for his political campaigning for stricter segregation between blacks and whites in the United States through tougher anti-miscegenation laws, for his advocacy for "repatriation" of African Americans to Africa, and for his book White America. He is also noted for having mediated collaboration between white southern segregationists and African American separatist organizations such as UNIA and the Peace Movement of Ethiopia to advocate for repatriation legislation, and for having been a personal friend of black racial separatist Marcus Garvey.