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.

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).