The Roman Catholic Diocese of Arlington is a diocese located in northern Virginia, established in 1974. It serves a diverse population of over 600,000 Catholics across 21 counties and the city of Alexandria. The diocese is part of the larger United States Conference of Catholic Bishops and is dedicated to spiritual growth, education, and community service. The diocese is led by a bishop, currently Bishop Michael F. Burbidge, who oversees various parishes, schools, and ministries. It emphasizes the importance of evangelization, social justice, and the promotion of Catholic teachings. The diocese also engages in outreach programs to support local communities and those in need.