| Trinity Catholic High School | |
| Streetaddress: | 926 Newfield Avenue |
| City: | Stamford |
| State: | Connecticut |
| County: | Fairfield County |
| Zipcode: | 06905 |
| Country: | USA |
| Coordinates: | 41.0919°N -73.5344°W |
| Religion: | Roman Catholic |
| Ceeb: | 070752 |
| Type: | Private, Coeducational |
| Fees: | Dependent upon grade level |
| Tuition: | $14,360 |
| Grades: | 9–12 |
| Campus Size: | 26acres |
| Athletics Conference: | Fairfield County Interscholastic Athletic Conference |
| Accreditation: | New England Association of Schools and Colleges[1] |
| Rival: | Stamford High, Westhill |
| Mascot: | Crusader |
| Team Name: | Crusaders |
| Colors: | Green and gold |
| Established: | 1957 |
| Status: | Closed |
| Closed: | 2020 |
| Alumni: | SGMSC |
| Enrollment: | 200 |
Trinity Catholic High School was a regional, coeducational Catholic school for grades 9-12 located in Stamford, Connecticut. The school closed at the end of the 2019–2020 academic year. It served parts of Fairfield County, Connecticut and Westchester County, New York. The school was a member of the FCIAC athletic conference. Trinity Catholic was accredited by the New England Association of Schools and Colleges, Inc. and the Connecticut Department of Education. It is located in the Roman Catholic Diocese of Bridgeport.
The school is situated on a 26acres campus[2] at 926 Newfield Avenue. The school had an initial capacity of approximately 1,200 students, however, due to cost concerns and the demand for smaller student to faculty ratios, has since reduced its enrollment in order to set itself apart from other schools. It was originally known as Stamford Catholic High School, but after other local Catholic Schools closed, was grouped with remaining students to create Trinity Catholic High School.
On February 27, 2020, the Most Reverend Frank J. Caggiano, Bishop of Bridgeport, announced[3] that Trinity Catholic High School would not reopen its doors for the 2020–21 academic year due to enrollment and budget issues.