Lawrence County Board of Realtors Share: Community Organizations Lawrence County Board of Realtors Visit Website PO Box 5402 New Castle, PA 16105 (724) 498-5368 About Map About A Board of Realtors who conduct business in Lawrence County and is affiliated with Pennsylvania Association of Realtors and National Association of Realtors. What's Nearby? Distance: 5 10 15 20 25 50 mi.