Karin Inger Monica Nilsson (born 4 May 1959 in Kisa) is a Swedish actress. She is a former child actress.

She is primarily known for her portrayal of Pippi Longstocking in the Swedish-produced TV series of the same name during 1969 which was later compiled, re-dubbed into English, and released as two feature films in 1969. In 1970, she reprised her role of Pippi in two subsequent feature films. She currently works as a secretary in Stockholm, occasionally taking small stage roles.