Hamden Hall Country Day School is a coeducational private day school in Hamden, Connecticut, educating students in preschool through grade 12. Hamden Hall was founded in 1912 as a country day school for boys by Dr. John P. Cushing, its first headmaster. It was the nation’s fourth country day school. The school has been coeducational since 1927 and expanded to include classes through grade 12 in 1934.