Naples is a city in Uintah County, Utah, United States. The population was 2,282 at the 2020 United States Census. Naples was listed as a tow…Naples is a city in Uintah County, Utah, United States. The population was 2,282 at the 2020 United States Census. Naples was listed as a town in 2000; it has since been classified as a fifth-class city by state law.