The first installment of Johnson County property and mobile home taxes is due on Sept. 1, 2025. Other than tax sale redemptions, payments must be delivered to the Treasurer’s Office, paid online, or postmarked by Sept. 30 to avoid a 1.5% monthly penalty that will begin Oct.
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First installment of property taxes due September 1; late payment penalties begin October 1
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Johnson County Treasurer designates The Gazette newspaper for official noticesJohnson County Treasurer Scott Finlayson has designated The Gazette as the official newspaper for publishing notices specific to the Treasurer’s Office, pursuant to Iowa Code section 618.7. 
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REMINDER: second installment of property taxes due, late payment penalties begin April 1, 2025Johnson County property owners are reminded that the second installment of property and mobile home taxes is due Saturday, March 1, 2025. 
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Second installment of property taxes due, late payment penalties begin April 1, 2025Johnson County property owners are reminded that the second installment of property and mobile home taxes is due Saturday, March 1, 2025. 
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Property taxes must be paid by Sept. 30, 2024; late payment penalties begin Oct. 1.The first installment of Johnson County property and mobile home taxes are due on Sept. 30, 2024. Payments must be delivered to the Treasurer’s Office, paid online or postmarked by Sept. 30 to avoid a 1.5% monthly penalty that will begin Oct. 1. 
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Second installment of property taxes due, late payment penalties begin April 2, 2024Johnson County property owners are reminded that the second installment of property and mobile home taxes is due Friday, March 1, 2024. 
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Johnson County Administration Building is temporarily closed and under construction until the summer of 2024The Johnson County Administration Building, 913 S. Dubuque St., Iowa City, is closed and undergoing a significant remodel to better serve the residents of Johnson County. 
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The Treasurer's Office is temporarily moving locations and will be closing at 11:30 a.m. on Nov. 3The Johnson County Treasurer’s Office will be moving to the Health & Human Services Building (HHS Building), 855 S. Dubuque St., Iowa City, while construction takes place in the Administration Building, 913 S. Dubuque St., Iowa City. 
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Reminder: Johnson County property taxes must be paid by Oct. 2, 2023; late payment penalties begin Oct. 3, 2023.The first installment of Johnson County property and mobile home taxes was due on Friday, Sept. 1, 2023. Payments must be delivered to the Treasurer’s Office, paid online, or postmarked by Oct. 2, 2023, to avoid a 1 ½ percent monthly penalty that will begin on Tuesday, Oct. 
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Johnson County Treasurer's Office announces tax sale information for 2023The Johnson County Treasurer's Office is holding its annual tax sale Tuesday, June 20, 2023. Property owners in Johnson County who have outstanding taxes are reminded to settle tax obligations by 5 p.m. on Friday, June 16, 2023. 
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Second installment of property taxes due no later than March 31, late payment penalties begin April 1Johnson County property owners are reminded that the second installment of property and mobile home taxes were due on Wednesday, March 1, 2023. 
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First installment of property taxes due Sept. 30, 2022; late payment penalties begin Oct. 1The first installment of Johnson County property and mobile home taxes was due on Thursday, Sept. 1, 2022. Payments must be delivered to the Treasurer’s Office, paid online, or postmarked by Friday, Sept. 
