Portsmouth is a city in Hampshire, England.
Portsmouth may also refer to:
Places Canada Portsmouth, Kingston, Ontario
Dominica Portsmouth, Dominica Portsmouth (Dominica constituency)
United Kingdom Portsmouth, West Yorkshire Portsmouth (UK Parliament constituency), a constituency abolished 1918
United States Portsmouth, Iowa Portsmouth, New Hampshire Portsmouth, North Carolina, a village Portsmouth Island, North Carolina Portsmouth, Ohio Portsmouth, Portland, Oregon Portsmouth, Rhode Island Portsmouth, Virginia Portsmouth Township, Michigan Portsmouth Square, a park in San Francisco
Ships HMS Portsmouth, several ships with the name USS Portsmouth, several ships with the name United States lightship Portsmouth (LV-101)
Sport Portsmouth F.C., an English football club Portsmouth Spartans, a former professional American football franchise, now the Detroit Lions Portsmouth Invitational Tournament, a basketball tournament Portsmouth yardstick, a handicapping system for yacht racing
Other uses "Portsmouth" (instrumental), an English folk tune Portsmouth Naval Shipyard, a U.S. Navy base in Kittery, Maine Treaty of Portsmouth, a 1905 treaty ending the Russo-Japanese War
See also USS Portsmouth, a list of ships