US Post Office is located at 6034 East St, Twin Lake, MI. This business specializes in Post Offices. US Post Office is open Mon, 9:05am-5pm; Tue, 9:05am-5pm; Wed, 9:05am-5pm; Thu, 9:05am-5pm; Fri, 9:05am-5pm; Sat, 8:05am-11:05am; Sun, Closed and accepts American Express, Discover, Mastercard and Visa.