The oldest lake in Kentucky is Lake Cumberland. It was created in the 1950s as a result of the construction of the Wolf Creek Dam on the Cumberland River. Prior to the creation of Lake Cumberland, there were several natural lakes in the area, but none of them were as large or as deep as Lake Cumberland.

Lake Cumberland is located in south-central Kentucky and covers an area of over 65,000 acres. It has a maximum depth of 200 feet and is known for its clear blue waters and abundant fish populations. The lake is a popular destination for boating, fishing, and other recreational activities.

While Lake Cumberland is not technically the oldest body of water in Kentucky, it is the oldest lake that exists in its current form. Prior to its creation, the area was home to a series of smaller lakes and streams that were formed by glacial activity during the last ice age.

Overall, Lake Cumberland is a unique and important feature of Kentucky's landscape and provides valuable recreational opportunities for residents and visitors alike.