Catholic Church in West Hattiesburg The newest Catholic Church in the Diocese of Biloxi located in West Hattiesburg. The Bellevue and Oak Grove areas have enjoyed tremendous growth in their residential neighborhoods over the past 25 years. Over the same period of time, Pine Belt priests, Catholics, and the Catholic Diocese of Biloxi have been interested in building another church in the area . The Diocese of Biloxi then identified a specific need in the West Hattiesburg / surrounding areas based on the continued growth and development in the region.