Cerulean is a census-designated place and unincorporated community in Trigg and Christian counties, Kentucky, United States.

As of the 2020 census, there were 303 people, 131 housing units, and 214 families residing in the CDP.

[6] The town is best known for its 19th-century health resort, the Cerulean Springs Hotel, which earned a famed reputation throughout the Upper South after its initial 1817 opening.

"[6] US poet laureate Robert Penn Warren spent his summers in Cerulean growing up as a child, staying with his maternal grandparents who lived there.

[10] Most students in Cerulean currently attend Trigg County Public Schools in Cadiz.