Poly Prep Country Day School is an independent, co-educational day school with two campuses in Brooklyn, New York, United States. The Middle School and Upper School are located in the Dyker Heights section of Brooklyn, while the Lower School is located in Brooklyn's Park Slope neighborhood. Initially founded as part of the Brooklyn Collegiate and Polytechnic Institute, Poly Prep now offers classes from nursery school through 12th grade.

Dyker Heights is a predominantly residential neighborhood in the southwest corner of the borough of Brooklyn in New York City. It is on a hill between Bay Ridge, Bensonhurst, Borough Park, and Gravesend Bay. The neighborhood is bounded by 7th and 14th Avenues, 65th Street, and the Belt Parkway on the west, east, north, and south, respectively.