Newport is the only city in, and the shire town of, Orleans County, Vermont, United States. As of the 2020 Census, the population was …Newport is the only city in, and the shire town of, Orleans County, Vermont, United States. As of the 2020 Census, the population was 4,455. The city contains the second-largest population of any municipality in the county, and has the smallest geographic area. It is the second-smallest city by population in Vermont. Newport is also the name of neighboring Newport Town.