Marinette County is reminding property owners in Marinette County that the second installment of the 2020 real estate property taxes are due on or before July 31st, 2021. All Marinette County postponed, or delinquent real estate property taxes are payable to the Marinette County Treasurer. Any payments made by mail should be sent to 1926 Hall Ave, Marinette, Wisconsin. If making tax payments in person please note that the Treasurer’s office is now located at 1925 Ella Court, in the building directly behind the original courthouse, now know as the County Resource Center. Office hours are 8am – 4:30pm, Monday through Friday. Tax payments can also be made online at