St. Theodore Guerin High School is a private Roman Catholic college-preparatory high school located in Noblesville, Indiana, a northern Indianapolis suburb. The school's mascot is the Golden Eagle and school colors are purple and gold. It is part of the Roman Catholic Diocese of Lafayette in Indiana. The enrollment is mostly drawn from local suburban municipalities such as Carmel, Fishers, Noblesville, Westfield, and Zionsville, as well as parts of northern Marion County and Kokomo, Indiana.