what county is winthrop ny
Winthrop, NY. Winthrop is located in north New York. Winthrop is part of Saint Lawrence County. Winthrop has 2.78 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Winthrop population is 301. Winthrop median household income is $46,771 in 2010-2014.