Our Mission
Holy Trinity School exists to communicate Gospel values, to provide a quality academic program and to develop a faith community which encourages respect for self, others, and the global community.    

About our School
Founded in 1913 under the leadership of Father John Carroll,  Holy Trinity School was established to provide Catholic children with an  education that would include faith development as well as academic instruction.  Originally staffed by the Sisters of Mercy, all classes are currently taught by dedicated lay teachers. The principal, Sister Kathleen Kelly, continues the tradition one hundred years tradition of the Sisters of Mercy in providing spiritual and educational leadership.

Our curriculum includes daily religious education along with a strong language arts and mathematics program. Such updated features as a fully electronic library, state-of-the-art technology center, advanced math, Spanish, and an instrumental music program enhance the curriculum. History, social studies and science round out the curriculum. Interactive Smart Boards have been installed in all classrooms. I-Pads enhance student learning in the classroom.  Holy Trinity School is accredited by the New England Association of Schools and Colleges.

Our school day runs from 8:10 a.m. until 2:25 p.m.  Transportation is provided for students residing in Wallingford.

Press here to download the 2015-16 Annual State of the Catholic School Report for Holy Trinity School.
About our Principal
In November 2013, Superintendent of Catholic Schools for the Archdiocese of Hartford, Dale R. Hoyt, presented the "2012 - 2013 Archdiocesan Distinguished Catholic School Administrator award" to Sister Kathleen Kelly, RSM, principal of Holy Trinity School.

Sister Katie Kelly, RSM, principal of Holy Trinity School, was named  the New England “Distinguished Principal of the Year”. Sister received this award at the National Catholic Education Conference in Houston, Texas.

She was also distinguished as a national “Distinguished Principal of the Year.”

Of course, even before being nominated for these awards, the school community has been aware of Sister’s devotion to Holy Trinity School.

Congratulations Sister Katie and THANK YOU for your years of leadership of our school community!

Holy Trinity School

11 North Whittlesey Ave.

Wallingford, CT 06492

Sister Kathleen Kelly RSM, Principal
Telephone: 203-269-4477

Fax: 203-294-4983


Kindergarten (full day) through Grade 8