St. Lawrence County Post Offices

589 1/2 Quinell Rd
Helena, New York 13649

8766 State Highway 56
Raymondville, New York 13678

St. Lawrence County

There are 2 US Post Offices in St. Lawrence County serving a total of 211 residents equating to 106 residents per post office. It's estimated that approximately 337 packages are handled across the 2 county post offices annually. St. Lawrence County is a county located in the U.S. state of New York. As of the 2010 census, the population was 111,944. The county seat is Canton. The county is named for the Saint Lawrence River, which in turn was named for the Catholic saint Lawrence of Rome, on whose Feast day the river was discovered by French explorer Jacques Cartier. St. Lawrence County comprises the Ogdensburg-Massena, NY Micropolitan Statistical Area. St. Lawrence County is the largest county by area in New York."