Peoa is an unincorporated census-designated place in southwestern Summit County, Utah, United States, between Jordanelle and Rockport State Parks. It lies along State Route 32, south of the city of Coalville, the county seat of Summit County. The population was 253 at the 2010 census. Peoa is unincorporated with the ZIP code of 84061. Peoa was first settled in 1857 by William W. Phelps and others.