Town Hall Address 113904 Elm Tree Road Marshfield, WI 54449 United States- Marathon County Website https://www.townofmcmillan.gov Town Clerk 715-389-1338 113904 Elm Tree Road Marshfield, WI 54449 United States Tax Collector 715-650-1595 113904 Elm Tree Road Marshfield, WI 54449 United States County Marathon