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.