Education for Life. Education for Eternity.

Welcome to Trinity-St. Luke's

By the grace and help of our Lord, the students and families of Trinity-St. Luke’s
Lutheran School will grow in faith through God’s Word and shine forth to all with the truth that Jesus Christ is our Savior.

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About Our School

TSL has served the Watertown community since 1977. We provide a Christ-centered education focused on Excellence. The continuing purpose of Trinity-St. Luke’s Lutheran School is to serve as a tool for the Holy Spirit to “…make disciples of all nations.” To that end TSL presents a clear message of God’s plan of salvation through word and example, teaches all subject matter on the basis of the inspired Word of God, prepares children to live lives that “thank and praise, serve and obey Him,” and assists parents in the spiritual training of their children.

Our Churches

The school is operated by Trinity Evangelical Lutheran Church and St. Luke’s Evangelical Lutheran Church of Watertown. Both churches are members of the Wisconsin Evangelical Lutheran Synod (WELS).


Our childcare program is created to provide the best possible care for your child in a safe Christian environment.

Our 3K and 4K programs will begin enrolling for the 2024-2025 school year in February. We offer 3K options of 1-5 days a week and 4K options for 3-5 days a week. We also offer child care options for our students from 7am to 6pm.

Our Event Calendars

Wisconsin Parental Choice Program

Trinity-St. Luke’s  is a part of the Wisconsin Parental Choice Program (WPCP), a statewide private school voucher program, that allows students whose families meet certain income qualifications the ability to attend a participating private or religious school of their choice, tuition free. You can learn more about WPCP and if you qualify by clicking here

Western Avenue Campus

Childcare – Grade 2

Clark Street Campus

Grades 3-8

Western Avenue Campus
801 South Fifth Street
Watertown, WI 53094
Telephone: 920-261-3615

Clark Street Campus
303 Clark Street
Watertown, WI 53094
Telephone: 920-261-3615

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