St. Croix or Saint Croix is an unincorporated community in northern Oil Township, Perry County, in the U.S. state of Indiana. The community lies along on the western edge of the Hoosier National Forest, near the intersection of State Road 62, Interstate 64, and State Road 37, northeast of the city of Tell City, the county seat of Perry County. Main points of interest in St. Croix include Holy Cross Church, cemetery, and Church Hall as well as the Etienne Saw Mill and Bear Hollow Mulch.