Naples is a city in Collier County, Florida, United States. As of the 2020 census, the population was 19,115, down from 19,539 at the 2010 census. Naples is a principal city of the Naples–Marco Island metropolitan area, which had a population of about 375,752 as of 2020. The city is known mostly for its high-priced homes, white-sand beaches, and numerous golf courses.