Yates County is a county located in the U.S. state of New York. As of the 2010 census, the population was 25,348. The county seat is Penn Yan. Yates county is part of the Rochester, New York Metropolitan Area.
Yates County is in the western part of New York State, northwest of Ithaca and southeast of Rochester. It has a total area of 376 square miles (970 km2), of which 338 square miles (880 km2) is land and 38 square miles (98 km2) (10%) is water. Yates County is in the Finger Lakes Region.