Jefferson County is a county on the northern border of the U.S. state of New York. As of the 2020 census, the population was 116,721. Its county seat is Watertown. The county is named after Thomas Jef
Oswego County is a county in the U.S. state of New York. As of the 2020 United States census, the population was 117,525. The county seat is Oswego. The county name is from a Mohawk-language word mean