Seneca County is located in the U.S. state of New York. As of the 2020 census, the population was 33,814. The primary county seat is Waterloo, moved there from the original county seat of Ovid in 1819. Wikipedia
Cities: Seneca Falls, Waterloo, Romulus, and more
County seat: Waterloo
Congressional district: 24th
Founded: 1804
Largest CDP: Seneca Falls