County Treasurer Connie Beyersdorff receives deposits and invests all moneys belonging to the County, and collects postponed and all delinquent real estate taxes and distributes said taxes to appropriate municipalities and school districts. Handles applications for tax deeds and takes property if taxes remain unpaid. Oversees property description functions of preparing assessment rolls, and real and personal property tax bills for all municipalities in the county, excluding the City of Wausau. Workbooks of all individual owners are kept consisting of maps and land description.

Note: 1st installments are due to local treasurers on or before January 31st. City of Wausau collects all three installments through July 31st.

For payment options of City Taxes or other first installments, contact your local treasurer.

For postponed or delinquent taxes, pay Marathon County Treasurer.

Tax Payments

County Treasurer collects postponed and delinquent taxes after January 31st.
Hours: 8am to 4:30 pm Monday-Friday except holidays.

Payments can be made in person, by mail or though electronic processing on the County's Online Land Records Portal. Mail payments should be sent to:

Marathon County Treasurer
500 Forest St
Wausau WI 54403

Please enclose the payment stub of the parcel number(s) when mailing payments. The parcel number is shown on your property tax bill and is 14-digits long.

Credit card and electronic check payments can be completed online through the County's Online Land Records. Credit card payments have a convenience fee of 2.39% and electronic check payments have a convenience fee of $1.50 for payments up to $10,000. Credit card and electronic check payments will be posted when the funds arrive at Marathon County.

Deadline is July 31st. Postmark of July 31st is accepted as timely, but an August 1st postmark will be delinquent with interest and penalty (10 ½% in August, calculated from February 1st). There is a five business-day grace period, but it must be in the hands of the treasurer--not postmarked.

Tax and assessment information is available on the Marathon County Online Records Portal. Searches are by address, PIN number, or owner name.