Friday is a surname. Notable people with the surname include:
David Friday (1876-1945), American educator
Gavin Friday (born 1959), Irish singer, composer and painter
Hershel Friday (1922-1994), American lawyer
Mike Friday (born 1972), English rugby player and coach
Nancy Friday (born 1933), American author
Pat Friday (born 1921), American singer
Robin Friday (1952–1990), English footballer
Tim Friday (born 1961), American ice hockey player
William C. Friday (1920-2012), American educator
