Trinity High School Graduates

"In the proud tradition of
Mercy (1948),
St. Thomas Aquinas (1954),
Rosary (1961),
St. Thomas Aquinas–Mercy (1985)"



Welcome to

Trinity Catholic High School

Trinity Catholic High School is a fully accredited, co-educational, college preparatory high school located in St Louis, Missouri.

Click here to view a message from our Archbishop

Please continue to pray for peace in our community.
Sincerely Yours in Christ,
Most Rev. Robert J. Carlson - Archbishop of St. Louis

                              SCHOOL  Calendar

Friday, January 23

Boys Basketball at Home vs. St. Francis Borgia!

Freshman @ 4:00pm / JV @ 5:15pm / Varsity @ 6:45pm

Father/Daughter Dinner

Monday, January 26 through Friday January 30

Catholic Schools Week : Click here > Schedule of events


Friday, January 30

Alumni Basketball game

                                School news

Tuition Incentive! Save $2,000 for the 2015-2016 school year!

Click here for more information > Trinity tuition scholarship flyer

Spring Trivia Night Flyer: April 18, 2015

           Mark your calendars for SATURDAY, OCTOBER 17, 2015 for the annual TRINITY CATHOLIC HIGH SCHOOL DINNER AUCTION!  Alums, parents, faculty, staff, and other friends of Trinity Catholic enjoy an evening out and raise much-needed funds.  There is something for everyone including dinner, drinks, silent auction items and a live auction portion of the evening.  Please monitor this website for more details as the date approaches or e-mail Dan Grumich at dgrumich@trinitycatholichigh.org of you would like to be put on the invitation mailing list.



The Martin Luther King, Jr. Model of Justice Award is an annual award presented to high school students who have demonstrated, through their attitude and work, a commitment to service humanity in the broader community.  These students have made social justice a central part of their life and have committed themselves “to the noble struggle for equal rights.”


This year two Trinity students have received this award. Sophomore Shayla Wilson was nominated through her parish, Holy Name of Jesus and senior Shannon Kettmann was nominated through Trinity Catholic High School.  Both Shayla and Shannon will be honored as a part of the 39th Annual Archdiocesan Mass and Commemoration at the Cathedral Basilica on January 18.



Congratulations to senior Kenyatta Turner on winning 1st prize in the North County Churches Uniting for Racial Harmony and Justice Oratorical Contest: “Mobilizing Community Action - All Hands In.”  Kenyatta will present her speech on Sunday, January 18 at the St. Louis Community College at Florissant Valley.

Kenyatta, you make us proud!


Trivia Night at Holy Name of Jesus - Saturday January 24th. Proceeds benefit the Belize Missionary Trips and the St. Vincent DePaul Society.

Click HERE for more information.

SAVE THE DATE: Food Trucks at Trinity! - May 6th, 5:00-8:00pm!

Alumni Golf Challenge Saturday, May 30th, 2015 at Belk Park Golf Course - Wood River, Illinois. Sign up soon, only 36 teams will be accepted!

Click HERE for more information!

Parent Organization and Booster Club - COME JOIN THE FUN !!


cafeteria monthly menu (HERE)