Waneta Lake is a small lake in the Finger Lakes region of the state of New York in the United States. The lake straddles the border of Steuben County and Schuyler County, and is within the towns of Wayne and Tyrone. Waneta Lake is 3.5 miles long (north-to-south) and half a mile wide (east-to-west), and lies just east of the southern branch of Keuka Lake. The lake is at 42°27?56?N 77°06?17?W? / ?42.46556°N 77.10472°W? / 42.46556; -77.10472? (Waneta Lake).