Stephen Harper (born 1959) is a former Canadian prime minister.
Stephen Harper may also refer to:
- Stephen Harper (designer), British car designer
- Steve Harper (born 1975), English footballer
- Steve Harper (footballer, born 1969), English footballer
- Steve Harper (Oregon politician) who served as majority leader in the 70th Oregon Legislative Assembly
- Steven C. Harper (born 1970), American professor at Brigham Young University
- Steven Piziks (pseudonym Steven Harper), American author of science fiction and horror fiction
- Steven Harper (Boston Public), high school principal on the American TV series Boston Public
- Steven Harper, a character in The Alphabet Killer