Town Hall Address 401 Locust St. Frederick, CO 80530 United States- Weld County Website https://frederickco.gov Town Clerk 720-382-5531 401 Locust St. Frederick, CO 80530 United States Tax Collector 720-382-5500 311 Fifth St. Frederick, CO 80530 United States Town Hall Hours Monday - Friday: 8:00 AM - 5:00 PM County Weld