Overview
Portsmouth Naval Shipyard repairs and maintains Navy submarines. Despite its name, it sits on an island in Kittery, Maine.
History
The shipyard was founded in 1800. The treaty ending the Russo-Japanese War was negotiated there in 1905.
Today
The shipyard is one of the region's largest employers, and work there requires security clearances.
Compiled October 2026. History is summarized for general interest; check primary sources for research. This landmark is local context, not an employer or job listing.