NOTICE - Updated 5/19/2020


The Lyon County offices will be opening on May 21st, 2020 however due to the continued health concerns raised by the COVID-19 virus the Lyon County Government Center and Public Works building will be conducting business by appointment only.


We ask that you wear a face mask when doing business in the Lyon County offices. To schedule an appointment online Click Here. Please call the department if you have any questions. The Booking application works best in: Chrome, Firefox, Edge and Safari web browsers.


Due to the Coronavirus (COVID-19), the Lyon County Assessor's Office has made changes to the property assessment procedure for the 2021 assessment year. During this time, our top priority is the safety of the public and staff. 

To view updates to Lyon County's property assessment procedure, click here.

To apply for homestead, click here, fill out online and print, or print to fill out. Return the application via mail or the drop box located at the rear entrance of the Lyon County Government Center.

Mailing Address:
Lyon County Assessor's Office
607 West Main Street
Marshall, MN 56258

Please contact our office if you have any questions. Thank you for your patience. 



The Lyon County Assessor's Office is responsible for establishing the market value and determining classification of property for tax purposes as of January 2 of each year. Minnesota Statutes require the assessor to inspect properties at least once in a five year interval.

To ensure uniformity and accuracy, a physical (on-site and in-person) inspection is necessary to obtain initial property characteristic data. The primary objective of the quintile review process is to maintain and improve data quality, integrity, or consistency.

Valuation Notices are mailed each spring advising property owners of the current property value and classification of each parcel. Local, County and State Boards of Equalization are held each year to provide a fair and objective forum for property owners to appeal their valuation or classification. 

The Assessor's Office is responsible for programs such as Green Acres, Blind/Disabled Homestead, local option disaster abatement, and most frequently addressed is homestead.

Duties include property tax splits, property ownership splits and combinations, processing of all Certificates of Real Estate Values and more.

Assessor FAQs

  • What does the Assessing Department do?

  • What is "Estimated Market Value"?

  • What is "Classification"?

  • What is a "Homestead" and why does it matter?

  • How does the Assessor determine the estimated market value of my property?

  • How can my estimated market value change when I haven't done anything to my property?

  • Does the estimated market value increase at the same rate on all properties?

  • How will my taxes change as a result of a change to the estimated market value?

  • If property values are increasing, does this mean more tax dollars for the City, the County and the School?

  • What authority does the Assessor have to view my property and what happens if I refuse to let the Assessor view the interior of my home?

  • How does the Assessor notify me of my property's estimated market value and classification?

  • What if I don't agree with my estimated market value or classification?

  • What if, after this informal talk with the Assessor, I still disagree with the estimated market value or classification?

  • What evidence do I need to present to the Board of Appeal and Equalization?

  • Is there any assistance I may be eligible for in paying my property taxes?