US Post Office is located at 379 Radiant Way, Radiant, VA. This business specializes in Post Offices. US Post Office is open Mon, 7:05am-4:05pm ; Tue, 7:05am-4:05pm ; Wed, 7:05am-4:05pm ; Thu, 7:05am-4:05pm ; Fri, 7:05am-4:05pm ; Sat, 8am-11am ; Sun, Closed. and accepts American Express, Discover and Visa.