Sign up to receive messages from our Bishop Burbidge, learn about unique opportunities to get involved, and be the first to know the news about our Diocese! The Diocese of Arlington is home to an estimated population of more than 460,000 Catholics living in 21 counties and seven cities in central and northern Virginia. Parishioners live out their faith at 70 parishes and six missions, and more than 16,800 students attend 50 Catholic pre-schools, elementary and high schools.