fort sumner was a coastal defense fortification on munjoy hill in portland, maine, united states. it was built in 1794 as part of the first system of coastal fortifications built by the united states. it was reportedly originally named fort allen after the nearby revolutionary war battery that probably became part of fort sumner, but was renamed in 1797 after increase sumner, the incumbent governor of massachusetts, of which maine was then a part. the location is now fort sumner park, also called standpipe park, at 60 north street.