Newman Central Catholic High School is a diocesan Catholic high school in Sterling, Illinois. It is located in the Roman Catholic Diocese of Rockford. It was founded as St. Mary High School in 1915, a parochial school attached to St. Mary's Parish. It later moved across the street and became Community Catholic High School. It adopted its present name when it moved into its current facilities in 1960. It was staffed in its early years by the Sisters of Loreto, but nearly all the staff today is laity.