The first half of Johnson County property taxes were due on Wednesday, Sept. 1, 2021. Payments must be delivered to the Treasurer’s Office or postmarked by Thursday, Sept. 30, 2021, to avoid a 1 ½ percent monthly penalty that will begin on Friday, Oct. 1, 2021. The Treasurer’s Office is located on the first floor of the Johnson County Administration Building, 913 S. Dubuque St. in Iowa City. Hours are Monday through Friday, 7:45 a.m. to 5:30 p.m.

Payments can also be made online at You may pay with an eCheck; debit card; or VISA, MasterCard, Discover or American Express credit card. If paying by eCheck, the online fee is only 30 cents. Credit card payments have a non-refundable service delivery fee added to the tax amount due for the service of paying taxes online with a credit card.

Questions about payments should be directed to the Treasurer’s Office at 319-356-6087 or [email protected]. Additional information about property taxes is available at