Ryfylke is a traditional district in the northeastern part of Rogaland county, Norway. The 4,546-square-kilometre (1,755 sq mi) district, encompassing about 60% of the county's area is located northeast of Stavanger and east of Haugesund. It includes the mainland, which is northeast and east of the Boknafjorden and east of the Høgsfjorden. It also consists of the islands on the south side of the Boknafjorden. To the east, Ryfylke borders the districts of Setesdal and Sirdal, to the south is Jæren, and to the west is Haugalandet. Ryfylke is one of the 15 districts in Western Norway.
Ryfylke comprises the contemporary municipalities of Sauda, Suldal, Hjelmeland, Strand, Kvitsøy, the eastern island portion of Stavanger, the Forsand part of Sandnes, and eastern Gjesdal. There are no large cities in Ryfylke, but there are two large towns, Sauda and Jørpeland.