Town Hall Address 203 S. Main St. Mackay, ID 83251 United States- Custer County Website https://mackayidaho-city.com/ Town Clerk 208-588-2274 203 S. Main St. Mackay, ID 83251 United States Tax Collector 208-588-2274 203 S. Main St. Mackay, ID 83251 United States County Custer