US Post Office is located at 137 Broadway Ave, Lake Wilson, MN. This business specializes in Post Offices. US Post Office is open Mon, 8:25am-3:59pm ; Tue, 8:25am-3:59pm ; Wed, 8:25am-3:59pm ; Thu, 8:25am-3:59pm ; Fri, 8:25am-3:59pm ; Sat, 8:25am-9am ; Sun, Closed. and accepts American Express, Discover and Visa.