The Kawartha Lakes are a chain of lakes in south-central Ontario, Canada that form the upper watershed of the Trent River. The lakes are located on the boundary between the Paleozoic limestone regions of the Golden Horseshoe, and the Precambrian granite Canadian Shield of northern and central Ontario.

The city of Kawartha Lakes (2011 population 73,214) is a unitary municipality in Central Ontario, Canada. Although called a city, Kawartha Lakes is the size of a typical Ontarian county and is mostly rural.

Kawartha Lakes may refer to:

• Kawartha Lakes (Ontario), a series of lakes in central Ontario, Canada
• Kawartha Lakes, a city in central Ontario, named for the lakes, and encompassing several of them