Some of the cities, towns, and places in St Lawrence County are Brasher, Canton, Chase Mills, Clare, Clifton, Colton, Conifer, Crary Mills, De Kalb, De Peyster, Edwards, Fine, Fowler, Gouverneur, Hammond, Helena, Hermon, Hopkinton, Lawrence, Lisbon, Louisville, Macomb, Madrid, Massena, Massena Center, Morley, Morristown, Newton Falls, Norfolk, Oswegatchie, Parishville, Piercefield, Pierrepont, Pitcairn, Potsdam, Pyrites, Rooseveltown, Rossie, Russell, South Colton, Stockholm, Waddington, Wanakena
St. Lawrence County is a county in the U.S. state of New York. As of the 2020 census, the population was 108,505. The county seat is Canton.
The county is named for the Saint Lawrence River, which in turn was named for the Christian saint Lawrence of Rome, on whose feast day the river was visited by French explorer Jacques Cartier.
St. Lawrence County comprises the Ogdensburg-Massena, NY Micropolitan Statistical Area and is New York's largest county by area.