Directions to the Chamber Mexico Area Chamber of Commerce 100 W. Jackson Street Mexico, Missouri 65265 Phone: 573-581-2765 Site Search Search for: Search Members Keywords: Upcoming Events Quick Links Join the Chamber Mainstreet Newsletter City of Mexico Website Top Area Employers 1. SSM Health St. Mary Hospital – Audrain: 425 Employees 2. True Manufacturing: 415 Employees 3. Spartan Light Metal Products: 363 Employees 4. Mexico Public School District: 346 Employees 5. Wal-Mart: 300 Employees