US Post Office is located at 210 Sw Market St, Lees Summit, MO. This business specializes in Post Offices. US Post Office is open Mon, 7am-6:05pm ; Tue, 7am-6:05pm ; Wed, 7am-6:05pm ; Thu, 7am-6:05pm ; Fri, 7am-6:05pm ; Sat, 9am-2pm ; Sun, Closed. and accepts American Express, Discover and Visa.