Bonnycastle is a neighborhood four miles (6 km) southeast of downtown Louisville, Kentucky USA. It is considered a part of a larger area of Louisville called The Highlands. Its boundaries are Bardstown Road, Cherokee Road, Eastern Parkway and Speed Avenue.

The Highlands is an area in Louisville, Kentucky which contains a high density of nightclubs, eclectic businesses, and many upscale and fast food restaurants. It is centered along a three-mile (5 km) stretch of Bardstown Road and Baxter Avenue and is so named because it sits atop a ridge between the middle and south forks of Beargrass Creek. The commercial area extends from the intersection of Bardstown Road and Taylorsville Road/Trevillian Way in the south, to the intersection of Baxter Avenue and Lexington Road in the north, a length of 3.2 miles (5.1 km). A 1⁄2-mile (800 m) section of the nearby Barret Avenue also contains many similar businesses. The residential area is separated from other adjacent areas like Germantown and Crescent Hill by the south and north forks of Beargrass Creek. The middle fork runs through Cherokee Park, and the south fork divides Germantown from Tyler Park, after flowing past several cemeteries and undeveloped forests downstream from Joe Creason Park. Due to its large collection of night clubs and restaurants, it is locally known as "Restaurant Row".