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Maxwell Lock and Dam
Location	Fayette / Washington counties, near Centerville, Pennsylvania
Coordinates	40°00′07″N 79°57′36″W / 40.002°N 79.960°W / 40.002; -79.960
Construction began	1960
Opening date	1965
Operator(s)	U.S. Army Corps of Engineers, Pittsburgh District
Dam and spillways
Impounds	Monongahela River

Maxwell Lock and Dam is a navigational lock and gated dam on the Monongahela River between Centerville in Washington County, and Luzerne Township in Fayette County in Pennsylvania. It is part of a series of dams that canalizes the Monongahela to a depth of at least 9 feet (2.7 m) for its entire length from Fairmont, West Virginia to Pittsburgh, Pennsylvania. It is maintained by the U.S. Army Corps of Engineers, Pittsburgh District.

Maxwell has two lock chambers located on the right-descending river bank. The dam's upper pool extends about 20.8 miles (33.5 km) upstream to Grays Landing Lock and Dam at Grays Landing, Pennsylvania.

Construction on Maxwell Lock and Dam began in 1960 and was completed in 1965.^[1] It replaced old Lock and Dam 6 at Rices Landing, Pennsylvania.

• List of crossings of the Monongahela River