Central Oregon is a geographic region in the U.S. state of Oregon and is traditionally considered to be made up of Deschutes, Jefferson, and Crook counties. Other definitions include larger areas, often encompassing areas to the north towards the Columbia River, eastward towards Burns, or south towards Klamath Falls. These three counties have a combined population of 153,558 as of the 2000 census, with Deschutes the largest of the three counties, having approximately four times the population of the other two counties combined. As of 2008, the most populous city in the region is Bend, with an estimated 80,995 residents. As defined by the three county definition, Central Oregon covers 7833 mi2 of land.
The region is located in the middle of the state with the Cascade Range to the west dividing the state from north to south, and the smaller Ochoco Mountains to the east. Portions of the region are part of a basalt plateau formed by the Columbia River Basalt Group, others are part of the slopes of the Cascades, and others part of the Basin and Range. The climate of the area is primarily arid due to the rain shadow effect of the Cascades on the western boundary of the region. Outdoor recreational activities, timber, and ranching are the primary economic activities.