Find Post office Near Me in Campbellton Welcome to our new site: catalog of Post office of Campbellton, Texas. Find Post office Near Me. Closed now United States Postal Service Establishment Finance Post office +1 800-275-8777 2905 Commerce Street, Campbellton, TX 78008 TEXAS-PAGES.COM Campbellton Post office Types of organizations in Campbellton, Texas All types Establishment Finance Food Local government office Lodging Post office School Veterinary care