dahlgren post office phone number
51. 1  United States Postal ServicePost Office 1 review on Yahoo. Merchant Verified. 2  17301 Dahlgren Rd, Dahlgren, VA 22448Cross Streets: Between 12th St and Hall Rd. ( 3 800) 275-8777. 4  Website. 5  Today : 8:30 AM - 4:00 PM Open now till 4:00 PM. See all hours. 6  Mon. 8:30 AM.