Roselle Catholic High School is a coeducational, Roman Catholic high school, located in Roselle, in Union County, New Jersey, United States. The school was established in 1959 and operates as part of the Roman Catholic Archdiocese of Newark. As of the 2013-14 school year, the school had an enrollment of 401 students and 26.9 classroom teachers, for a student–teacher ratio of 14.9:1. Morses Creek (New Jersey) flows over the property.