Cayuga County is a county located in the U.S. state of New York. It was named for one of the tribes of Indians in the Iroquois Confederation. As of the 2010 census, the population was 80,026. Its county seat is Auburn.
Cayuga County is located in the west central part of the state, in the Finger Lakes region. Owasco Lake is in the center of the county, and Cayuga Lake forms part of the western boundary. Lake Ontario is on the northern border, and Skaneateles Lake and Cross Lake form part of the eastern border. Cayuga County has more waterfront land than any other county in the state not adjacent to the Atlantic Ocean.