Fredrik Engelstad (born 12 March 1944) is a Norwegian sociologist. He has written several books. He is the son of writer Carl Fredrik Engelstad and physician Vibeke Engelstad, and a nephew of archivist Sigurd Engelstad. He is married to professor Irene Johnson. He has been a visiting fellow at Yale University (1981), the University of California, Berkeley (1993), the University of Chicago (1996) and the Northwestern University (2006).