US Post Office is located at 609 Maple St, Fenton, IA. This business specializes in Post Offices. US Post Office is open Mon, 7:05am-4:25pm; Tue, 7:05am-4:25pm; Wed, 7:05am-4:25pm; Thu, 7:05am-4:25pm; Fri, 7:05am-4:25pm; Sat, 7:05am-8:59am; Sun, Closed and accepts American Express, Discover, Mastercard and Visa.