Knut Ingebrikt Robberstad (22 April 1899 – 31 July 1981) was a Norwegian jurist and philologist.
He was born in Askøy, Hordaland, Norway. He was a professor of jurisprudence at the University of Oslo from 1945 to 1969. His juridical publications include Oreigningsvederlaget (1968) and Rettsutferd (1969). A philologist who chaired Noregs Mållag from 1952 to 1957, he translated several documents from Old Norse, including Magnus Lagabøters bylov (1923), a law dating from the reign of Magnus IV of Norway, and Gulatingslovi (1937).
| Chairman of Noregs Mållag