Newcomer is a surname. Notable people with the surname include:
Benjamin Franklin Newcomer (1827–1901), American railroad executive and bank president Carrie Newcomer (born 1958), American singer and songwriter Christian Newcomer (1749–1830), American farmer and preacher Clarence Charles Newcomer (1923 – 2005), US District Judge of the United States District Court for the Eastern District of Pennsylvania Francis K. Newcomer (1889–1967), Governor of the Panama Canal Zone John Newcomer, American game developer, creator of Joust John Newcomer (Maryland politician) (1797–1861), American politician and farmer John Darlington Newcomer (1867–1931), American architect Scott Newcomer (born 1965), American politician