"We can't have full knowledge all at once. We must start by believing; then afterwards we may be led on to master the evidence for ourselves"


Welcome to St. Thomas Aquinas
Catholic High School

Guam's newest Archdiocesan Catholic co-educational high school offering a college preparatory academic program that challenges and develops its students to become moral and productive citizens with global perspectives firmly rooted in the Gospel of Jesus Christ through the teachings of the Catholic Church.

Boys & Girls Golf

Updated Score Board.


College Fair at St. John's School


Waseda University from Japan visit STA.

Online Survey

In an effort to help move the school forward, we humbly ask you to complete a survey focusing on the vision and mission of the school. The survey should only take a few minutes to complete.

* STA survey (adults)

* STA survey (students)

STA Online Payment


STAcapella, under the direction of Mr Norman Babia, brought a message of gratitude through the gift of song  to the Sisters of Mercy at Mercy Care on September 17, 2014.
St Thomas Aquinas Catholic High School is grateful for the support of the Sisters.

2014 AP Scholar


St. Thomas Aquinas Students Earn Academic Distinction The College Board grants AP Scholar recognition to those who earn an average of 3 or higher on 3 AP exams.


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