St. Thomas Aquinas Parish is a Roman Catholic parish in Madison, Wisconsin.

St. Thomas Aquinas Parish is a Roman Catholic parish located in Madison, Wisconsin, and belongs to the Lake Mendota Vicariate of the Roman Catholic Diocese of Madison. The Diocese of Madison organizes its parishes into vicariates to foster regional coordination of pastoral action. The Lake Mendota Vicariate, centered around the Madison area, comprises several parishes including Our Lady Queen of Peace Parish, Queen of Apostles Parish, Our Lady of Guadalupe Parish, Blessed Sacrament Parish, St. Paul University Parish, and the Cathedral of St. Bernard of Clairvaux, along with St. Thomas Aquinas Parish. The vicariate is overseen by a vicar forane, currently Fr. Brian Wilk, who serves as pastor of Our Lady Queen of Peace Parish. This structure enables collaboration among the member parishes to serve the Catholic community in the Madison region. As a parish within this vicariate, St. Thomas Aquinas participates in the shared mission and communal life of the local Church.