US Post Office is located at 108 Park Ave N, Vermillion, MN. This business specializes in Post Offices. US Post Office is open Mon, 8am-4:05pm; Tue, 8am-4:05pm; Wed, 8am-4:05pm; Thu, 8am-4:05pm; Fri, 8am-4:05pm; Sat, 8am-10am; Sun, Closed and accepts American Express, Discover, Mastercard and Visa.