Seip is a surname. Notable people with the surname include:
Andreas Martin Seip (1790–1850), Norwegian military officer and politician
Anne-Lise Seip (born 1933), Norwegian historian and former politician
Didrik Arup Seip (1884-1963), Norwegian professor of northern Germanic languages
Hans Kristian Seip (1881-1945), Norwegian engineer and politician
Hans Kristian Seip (forester) (born 1920), Norwegian professor and politician
Hans Martin Seip (born 1937), Norwegian chemist
Helge Seip (1919-2004), Norwegian politician
Jens Arup Seip (1905-1992), Norwegian historian, husband of Anne-Lise Seip
Karl Seip (1850-1909), Norwegian priest, educator, and briefly Minister of Education and Church Affairs
Kristian Seip (born 1962), Norwegian mathematician
Marcel Seip (born 1982), Dutch footballer
Tim Seip (born 1969), American politician
