Bengt Ivar Crantz (1916–2001) was a Swedish painter. Born in Toarp, Älvsborg County, he was the son of farmer Richard Krantz and Lovisa Hult. Crantz studied briefly at Otte Sköld’s painting school but was largely self-taught as an artist.

His career reflects the tradition of independent Swedish painters who combined limited formal training with personal exploration, contributing to the diversity of mid-20th century Swedish art.