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 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. Now split into three separate divisions, Hamden Hall enrolls the majority of its nearly 600 students in the upper and middle schools and the remainder in the lower school.

Hamden is a town in New Haven County, Connecticut, United States. The town's nickname is "The Land of the Sleeping Giant". The town is part of the South Central Connecticut Planning Region. The population was 61,169 at the 2020 census.