Portsmouth, New Hampshire Welcome sign in downtown Portsmouth Market Square in 1853 Congress Street ( c. 1905) Portsmouth Harbor, New Hampshire by William James Glackens (1909) Waterfront, 1917 Portsmouth is a city in Rockingham County, New Hampshire, United States. As of the 2020 census it had a population of 21,956. 
A comprehensive guide to Portsmouth NH and the Seacoast for travelers and residents. Things to do, calendar, restaurants, lodging, photos and more.
Islands & Harbor Bike Tour - Must See Sites of Portsmouth & New Castle NH. 46. Bike Tours. from. $52.00. per adult. Boston to Kennebunkport with Optional Lobster Tour. 4. Bus Tours.
New Hampshire (NH) Portsmouth Portsmouth Tourism: Best of Portsmouth About Portsmouth Don your walking shoes, breathe in the ocean air and set out to discover this picturesque maritime town. You can join one of several organized walking tours or explore on your own.
Visitor Info Portsmouth, N.H ., a city of roughly 21,000 people, sits near the mouth of the Piscataqua River, a short, wide river that divides New Hampshire and Maine.