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Departments | Auditor | Frequently Asked Questions

Where are you located?
  • Cerro Gordo County Courthouse
  • Cerro Gordo County Auditor's Office
  • 220 North Washington Avenue
  • Mason City, IA 50401

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What is your fax number?

(641) 421-3139

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When is your office open?

The Auditor's Office is open Monday through Friday from 8:00 a.m. until 4:30 p.m., except holidays. Exceptions to those hours are when state law requires the office hours to be extended for the filing of nomination papers, voter registration and absentee voting.

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What is the phone number for the Clerk of Court?

The phone number for the Clerk of Court is (641) 424-6431.

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What is the phone number for the Mason City City Hall?

The phone number for the Mason City City Hall is (641) 421-3600.

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Where is the County Engineer's Office located?

The address of the County Engineer's Office is 2716 South Federal Avenue, Mason City. The phone number is (641) 424-9037.

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Where is the Social Security Office located?

The address of the local Social Security Office is 625 Village Green Drive Southwest, Mason City. The phone number is (866) 365-6708 or (866) 365-6709.

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Where is the Public Defender's Office located?

The address of the Public Defender is Brick and Tile Building, 103 East State Street, Suite 210, Mason City. The phone number is (641) 423-4181.

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What is the phone number for the landfill?

The phone number for the Landfill of North Iowa is (641) 357-5452.

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I am starting a business. Are there any permits that I need from the county?

Depending on the type of business, you should inquire with the County Health Department (641) 421-9300, the Iowa Department of Revenue and Finance (800) 367-3388), and the city where the business will be located.

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Where is the Health Department?

The Cerro Gordo County Health Department is located on the third floor of the Mohawk Square Building, 22 North Georgia, Mason City.

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Where can I get a copy of my birth certificate?

Birth certificates may be obtained by the County Recorder's Office. Their phone number is (641) 421-3056.

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Is there a notary in the courthouse? Is there a charge to have my signature notarized?

There are several notaries among various offices in the courthouse. There is no charge to have your signature notarized.

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Where can I purchase a plat book?

The plat book is available in the Auditor's Office for $25.00. An updated plat book is published in November of every year.

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How often does the Board of Supervisors meet?

The Board of Supervisors hold regular sessions at 9:45 a.m. on Tuesdays. Occasionally, the Board meets in special sessions at various times throughout the week. Get the current regular and special sessions agenda (pdf).

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How do I change the address for my tax statement?

You may change your address where your tax statement is mailed in person in the Auditor's Office. To do this, you must complete the Request to Change Mailing Address for Real Estate Tax Bill form (pdf) and mail it or drop it off at the Auditor's Office.

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Who can register to vote?

To register to vote you must be a citizen of the United States, a resident of Iowa, at least 17 1/2 years old, have not been convicted of a felony (or have had your rights restored), not currently judged by a court to be "incompetent to vote", and you must have given up your right to vote in any other place. However, you must be 18 years old in order to vote.

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How can I register to vote?

There are several ways in which to register to vote. Voter registration forms are available at various locations including the Secretary of States website here, or you may pick one up at the Auditor's Office. You may also register to vote when you obtain a driver's license. You may request that the Auditor's Office mail a voter registration form to you. You must provide the information called for on the application and submit it to the Auditor's Office.

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Do I have to change my voter registration if my name or address changes?

Yes. A voter registration form is also used to change your name or address.

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Was I selected for jury duty because I am registered to vote?

Jurors are randomly drawn by a computer among a current voter registration list and a current motor vehicle operators list. After a juror has served one month, they are eligible to be a juror again after two years have expired.

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How can I find out what work was done in the drainage district that I received an assessment for?

The Auditor's Office retains records of claims for work done in each supervisor and trustee drainage district. You are welcome to stop by the office and look through the claims and the drainage district file in order to determine what work was done.

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This information was prepared by the office of the Cerro Gordo County Auditor.

Official Seal of Cerro Gordo County

Cerro Gordo County Auditor's Office

  • 220 North Washington Avenue
  • Mason City, IA 50401
  • Phone:(641) 421-3027
  • Fax:(641) 421-3139