Juab County /ˈdʒuːæb/ is a county located in the U.S. state of Utah. As of the 2010 census, the population was 10,246. Its county seat and largest city is Nephi. The county was named from a Native American word meaning thirsty valley, or possibly only valley.Juab County is part of the Provo–Orem, UT Metropolitan Statistical Area, which is also included in the Salt Lake City-Provo-Orem, UT Combined Statistical Area.