Seip is a surname. Notable people with the surname include:
Andreas Martin Seip (1790–1850), Norwegian military officer and politicianAnne-Lise Seip (born 1933), Norwegian historian and former politicianDidrik Arup Seip (1884-1963), Norwegian professor of northern Germanic languagesHans Kristian Seip (1881-1945), Norwegian engineer and politicianHans Kristian Seip (forester) (born 1920), Norwegian professor and politicianHans Martin Seip (born 1937), Norwegian chemistHelge Seip (1919-2004), Norwegian politicianJens Arup Seip (1905-1992), Norwegian historian, husband of Anne-Lise SeipKarl Seip (1850-1909), Norwegian priest, educator, and briefly Minister of Education and Church AffairsKristian Seip (born 1962), Norwegian mathematicianMarcel Seip (born 1982), Dutch footballerTim Seip (born 1969), American politician