|Sacred Heart High School|
142 South Elm Street
|Motto||Learning, Spirit, Service|
|Religious affiliation(s)||Roman Catholic|
|School district||Archdiocese of Hartford|
|Superintendent||Valerie Mara (interim)|
|Teaching staff||30 Full/part-time teachers|
|Enrollment||350 (September 2012)|
|Average class size||21|
|Color(s)||Maroon and gold|
|Athletics conference||Naugatuck Valley League|
|Sports||Boys: football, soccer, cross-country, basketball, swimming, baseball, tennis, cheerleading, indoor track, golf, track & field|
Girls: soccer, swimming, cross-country, basketball, softball, cheerleading, golf, indoor track, dance, tennis, track & field, cooperative gymnastics
|Accreditation||New England Association of Schools and Colleges|
Sacred Heart High School was a private, Roman Catholic high school located in the downtown district in the city of Waterbury, Connecticut. It was in the jurisdiction of the Roman Catholic Archdiocese of Hartford.
Sacred Heart was established in 1922 as an all-girls school. The school became coeducational in 1938. Since 1975, the school has been located in the old Waterbury Catholic High School building in downtown Waterbury.
On February 11, 2021, Sacred Heart announced it would be closing at the end of the 2020–2021 school year. The school's president said it was in part due to declining enrollment at the school.