Ryfylke is a traditional district in the northeastern part of Rogaland county, Norway. The 4,546-square-kilometre district is located northeast of the city of Stavanger and east of the city of Haugesund and it encompasses about 60% of the county's area. It includes the mainland located northeast and east of the Boknafjorden and east of the Høgsfjorden. It also includes the islands located 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, and the Forsand part of Sandnes. There are no large cities in Ryfylke, but there are two major towns, Sauda and Jørpeland.
Scenic attractions include the world-famous attractions of the Lysefjord with the mountain Preikestolen and the mountain Kjerag. The landscape of Ryfylke is characterized by high mountains in the interior; the highest and wildest are located in the north and are formed by hard, igneous rock.