Håkon Steinar Giil (born 28 January 1943 in Hyllestad) is a Norwegian politician for the Centre Party.
He was elected to the Norwegian Parliament from Sogn og Fjordane in 1993, but was not re-elected in 1997. Instead he served in the position of deputy representative during the term 1997 - 2001.
Giil served as mayor of Hyllestad municipality from 1987 to 1993. He was originally a member of the executive committee of the municipality council, in 1983 - 1987, and returned to this position from 1999 to 2015.