Berge Østenstad (born 15 September 1964) is a Norwegian chess player and Norway's sixth International Grandmaster.

He appears on the official FIDE rating list as "Ostenstad, Berge".

Berge Østenstad has won more Norwegian Chess Championships than any other player apart from Simen Agdestein, eight in total.

He achieved his first GM norm in Gausdal in 1990, his second in Biel in 1990 and the third in Gothenburg in 2003.

This biographical article relating to a Norwegian chess figure is a stub.