Forestbrook is a census-designated place (CDP) in Horry County, South Carolina, United States.

According to the United States Census Bureau, the CDP has a total area of 3.7 square miles (9.7 km2), all land.

[5] As of the 2020 United States census, there were 6,656 people, 2,528 households, and 1,936 families residing in the CDP.

As of the census[3] of 2000, there were 3,391 people, 1,277 households, and 994 families residing in the CDP.

15.5% of all households were made up of individuals, and 4.1% had someone living alone who was 65 years of age or older.