Ingebretsen

 Ingebretsen  is a  Norwegian patronymic surname. Notable people with the surname include:


 * Bjarne Kortgaard Ingebretsen, Norwegian football midfielder
 * 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