| St. Thomas Aquinas Catholic High School | |
| Motto: | Admiratio est principium philosophandi |
| Motto Translation: | Wonder is the Desire for Knowledge |
| Established: | 2008 |
| Closed: | 2015 |
| Type: | Private, Coeducational |
| Religion: | Roman Catholic |
| Grades: | 9-12 |
| Principal: | Ms. Pilar Perez Williams |
| Director: | Mrs. Ichie Shepherd |
| Administrator: | Deacon Steve MartÃnez |
| Chaplain: | Fr. Val Rodriguez |
| Ratio: | 7 to 1 |
| Ceeb: | 525-209 |
| Faculty: | 13 |
| Tuition: | $8,575 |
| Enrollment: | 71 |
| Athletics: | Member IIAAG |
| Accreditation: | WASC & WCEA |
| Mascot: | Lion |
| Affiliations: | NCEA, BBBS, AP-Board, STEM Education Coalition, NHS, Tri-M. |
| Classrooms: | 6 |
| Streetaddress: | 131 Judge Sablan Street |
| City: | Ordot |
| State: | Guam |
| Pushpin Map: | Guam |
St. Thomas Aquinas Catholic High School was a coeducational college preparatory Roman Catholic school located at 131 Judge Sablan Street in Ordot, Guam, a United States territory in the Western Pacific Ocean.[1]
The school opened in the Fall of 2008, and was the newest Catholic High School on Guam, under the Archdiocese of Agana.[2]
In 2015 the archdiocese decided that as the school did not have enough students, it should be closed.[3]