Town Hall Address 711 Main St. Grain Valley, MO 64029 United States- Jackson County Website https://cityofgrainvalley.org Town Clerk 816-847-6211 711 Main St. Grain Valley, MO 64029 United States Tax Collector 816-847-6280 711 Main St. Grain Valley, MO 64029 United States Town Hall Hours Monday - Friday: 8:00 AM - 5:00 PM County Jackson