Stoneybrook High School is the only public (not private) high school in Stoneybrook, Connecticut. In Mystery #21 Claudia and the Recipe for Danger, the contest was held in the gym of Stoneybrook High School.

Claudia's sister Janine goes to school there and so do Sam Thomas and Charlie Thomas, Kristy Thomas's older brothers.

Janine received an award at SHS in Book #33 Claudia and the Great Search.