Portsmouth (New Hampshire)

Portsmouth is a city in Rockingham County, New Hampshire, in the United States. It is the only city in the county, but only the fourth-largest community, with a population of 21,233 at the 2010 census. As of 2016 the estimated population was 21,485. A historic seaport and popular summer tourist destination, Portsmouth was the home of the Strategic Air Command's Pease Air Force Base, later converted to Portsmouth International Airport at Pease with limited commercial air service.