Erik Grønseth (13 September 1925 – 8 October 2005) was a Norwegian sociologist, Professor of Sociology at the University of Oslo from 1971 to 1989, and "one of the post-war pioneers of sociology" in Norway.

[2] Together with Harriet Holter, he is also considered the founder of Norwegian family sociology.

[3][4] As a young man, he was introduced to Arne Næss, who encouraged him to study sociology.

[2] He continued his research on men, work and families, and in the early 1970s, he carried out a study on couples who shared their jobs, a study that attracted much media interest in Norway and abroad.

[5] Grønseth's views on family and sexuality were considered "radical" in the 1960s; after an NRK interview in 1963, in which he advocated sex education, all the bishops of the state Church of Norway as well as 129,000 housewives signed a protest petition against him.