Westwood is a census-designated place (CDP) in Boyd County, Kentucky, United States. The population was 4,746 at the 2010 census. It serves as a suburb of the city of Ashland. Westwood is closely affiliated with Ashland, as it shares its ZIP code and bus system with the city. Westwood is located on a flat to hilly elevation just west of the Ohio River. The flat hilltop is unusual to eastern Kentucky and was created by the preglacial Teays River which existed in ancient times and flowed in the opposite direction of the Ohio River.
Westwood is a part of the Huntington-Ashland, WV-KY-OH, Metropolitan Statistical Area (MSA).