Sunol, Nebraska  Sunol is an unincorporated community and census-designated place in Cheyenne County, Nebraska, United States. As of the 2010 census it had a population of 73. Sunol is located in the valley of Lodgepole Creek on U.S. routes 30 and 385, east of Sidney, the county seat. Interstate 80 is to the south via Nebraska Highway 17E. Sunol was platted in 1909. A post office was established at Sunol in 1910, and remained in operation until it was discontinued in 1973.