Old Buckenham Hall School (commonly known as OBH) is a day and boarding preparatory school with pre-prep for boys and girls in the village of Brettenham, Suffolk, England.

Founded in 1862, the school has been on its current site since 1956, and currently accommodates 250 girls and boys between the ages of 2 and 13 years.

The school is located in Brettenham Park, a grade II* listed building in 85 acres (340,000 m²) of parkland in the Suffolk village of Brettenham. Its pupils take the Common Entrance exam, going on to a range of public schools such as Uppingham, Oundle, Harrow, Rugby, Framlingham and The Leys.

From 5 January 2026, the school will become part of the Rugby Schools Group, which currently includes Bilton Grange School and Aysgarth School.