Town Hall Address 5490 Fifth St. Cottleville, MO 63304 United States- St. Charles County Website https://www.cityofcottleville.com Town Clerk 636-498-6565 Ext. 5 5490 Fifth St. Cottleville, MO 63304 United States Tax Collector 636-498-6565 Ext. 5 5490 Fifth St. Cottleville, MO 63304 United States County St. Charles