Windy Hills is a home rule-class city, incorporated in 1952, in eastern Jefferson County, Kentucky, United States.

It is bordered to the north by Indian Hills, at its northernmost point by Northfield, to the east by Graymoor-Devondale, to the south by Woodlawn Park and St. Matthews, to the southwest by Maryhill Estates, and otherwise by consolidated Louisville/Jefferson County.

The Muddy Fork of Beargrass Creek, a tributary of the Ohio River, rises in the northeastern quarter of the city and flows westerly towards Hubbards Lane.

According to the United States Census Bureau, the city has a total area of 0.93 square miles (2.4 km2), of which 2.3 acres (9,376 m2), or 0.39%, are water.

28.3% of all households were made up of individuals, and 17.7% had someone living alone who was 65 years of age or older.