Owyhee County is a county in the southwestern corner of the U.S. state of Idaho. As of the 2020 census, the population was 11,913. The county seat is Murphy, and its largest city is Homedale. In area it is the second-largest county in Idaho, behind Idaho County.

Murphy is a census-designated place in, and the county seat of, Owyhee County, Idaho, United States. It is among the smallest of county seats nationwide, with a population as of the 2020 census of 96. Murphy is part of the Boise City–Nampa, Idaho Metropolitan Statistical Area. Murphy is also located within the census-designated place bearing its name. Murphy is home to the Owyhee County Historical Museum and Library.