Oakbrook is a census-designated place (CDP) in Boone County, Kentucky, United States.

Oakbrook is located in eastern Boone County and is bordered by the city of Florence to the east and south, and by the unincorporated Burlington (the county seat) to the west.

Kentucky Route 18 (Burlington Pike) forms the northern edge of the Oakbrook CDP.

There were 3,030 housing units at an average density of 929.0 per square mile (358.7/km2).

20.8% of all households were made up of individuals, and 4.3% had someone living alone who was 65 years of age or older.