The City of Mequon Finance Department collects real estate taxes through January 31. Any payments made after January 31 are paid directly to the Ozaukee County Treasurer's Office. Second installment payments due on or before July 31, 2026, are collected by the County or can also be paid at the Port Washington State Bank Mequon or Thiensville locations.
Tax bills for 2025 are available to view, print and pay online through the link to the Catalis Property Search link here and from the City website home page link called "Tax Payment".
Want to look up tax and assessment parcel information?
For ease of access, tax and assessment parcel information is available online through Ozaukee County's Ascent website, Click Here. When searching for parcel information in Mequon, please enter City of Mequon in the Municipality drop down box and enter the Street Number only to get the best search results. Please see the attached How to Search for Tax Bill and Receipt guide for more tips.
Until the deadline of January 31, in-person payments at City Hall were accepted between 8:30 a.m. and 3:30 p.m. during regular business hours.