Portsmouth is located in Rockingham County, NH. The population is 21,293, making Portsmouth the largest city in Rockingham County and the 7th largest city in the state of New Hampshire.
There are 6 public schools in Portsmouth with an average Homefacts rating of A-. The total crime rate for Portsmouth is very low , and there are 14 registered sex offenders residing in the city. Unemployment in Portsmouth is low and the median home sales price is $0. Detailed and up-to-date Portsmouth property reports are available for any property address.
Cities near Portsmouth include Newington, New Castle and Greenland.