The hamlet of Chazy is located in the northeastern part of the town of Chazy on the
Little Chazy River, west of where the river flows into
Lake Champlain.
U.S. Route 9 passes through the center of the hamlet, leading south to
Plattsburgh, the
county seat, and north to the
Canada–US border.
New York State Route 191 runs west from Chazy to Exit 41 of
Interstate 87, which leads south to
Albany, New York's state capital, and north (via
Quebec Autoroute 15) to
Montreal. According to the
United States Census Bureau, the Chazy CDP has a total area of , of which , or 1.04%, is water. ==Demographics==