Ingebretsen is a Norwegian patronymic surname. Notable people with the surname include:
Bjarne Kortgaard Ingebretsen, Norwegian football midfielder Bjørn Petter Ingebretsen (born 1967), Norwegian football coach Eugen Ingebretsen (1884–1949), Norwegian gymnast Herman Smitt Ingebretsen (1891–1961), Norwegian politician for the Conservative Party Olaf Ingebretsen (1892–1971), Norwegian gymnast Paul Ingebretsen (1904–1968), Norwegian politician for the Liberal Party Robert B. Ingebretsen (1948–2003), American engineer and pioneer in the development of digital sound