Property Tax

The Tax Division is responsible for collecting taxes for real estate property, moble homes, utilities, computer equipment, industrial machinery, bushels of grain, monies and credits, buildings on leased land, and city and county special assessments, including delinquent sewer rental and solid waste rates and charges for all tax levying and tax certifying entities of the county.

The Treasurer is also responsible for conducting the tax sale; processing tax sale redemptions; issuing tax sale deeds; processing tax suspentions; preparing plat and moble home tax clearances; and administering the Iowa Property Tax Credit Program based on age/income.

For additional information see our Frequently Asked Questions.

You can pay property taxes on line at

As a property owner in Sioux County, you should be aware of the following requirements.

Value Notification:
The Sioux County Assessor determines property values and provides notification to property owners. Please contact the Assessor's Office for the latest valuation information on your property.

New Ownership:
If you are a new owner of a property, contact the Treasurer's Office at (712) 737-2222 to obtain a tax statement if you have not received one.  To inquiry about a parcel click treasurer & assessor inquiry.

If your mortgage company is responsible for payment of your tax, contact them to confirm they have the correct tax information for your property.

Late Interest:
Failure to receive a tax statement is not a defense to the payment of the tax and any late interest that has accrued. Iowa law requires the Treasurer to assess late interest on all delinquent payments at the rate of 1.5% per month, rounded to the nearest dollar.

The U.S. Postal Service postmark is the only date recognized for date of mailing. We do not accept the date written on your check or a business metered date as proof of the mailing date. Before mailing your payment, check with your local post office to make sure the postmark date will be prior to the late interest date. If you want to be sure that your payment has a postmark before the late interest date, have the post office postmark the envelope in your presence.

Annual Tax Statements:
Annual tax statements are mailed once a year in the month of August. The tax statement has two detachable payment stubs.

Your property tax may be paid in full or in two installments. The first half is due on September 1 and becomes delinquent after September 30. The second half is due March 1 and becomes delinquent after March 31.

If you have not received a tax statement, please contact the Treasurer's office for a duplicate statement at (712) 737-2222.