Assessors Department

Adeline Olson
PO Box 616
101 Main Avenue North
Thief River Falls, MN 56701
Phone: 218-683-7029
Fax: 218-683-7026 (attn: assessor)


The County Assessors office is responsible for estimating the market value and determining the legislative classification of all property in Pennington County for real estate tax purposes. Valuations must meet the standards established by Minnesota Statues and the Minnesota Department of Revenue.


The estimated market value and classification are based on the condition and use of the property on January 2nd of each year. A notice of values and classes are mailed to the property owner in the spring of the year. If they disagree with the value or classification or have a question on the notice they received they should contact this office. If they feel they need to appeal the value or class further, there is information on the Notice as to the process. After the appeal process, the values and classifications are set and used for property tax for the following year.

Properties which are occupied as a primary residence by the owner or a qualified relative of the owner may qualify for homestead. Occupants should contact the County Assessors office and fill out a homestead application or a relative homestead application. Homestead is a property tax reduction intended to keep taxes lower on owner/qualified relative occupied homes.

For copies of plats contact: County Recorder 218-683-7027

For current year taxes contact: County Treasurer 218-683-7022

For delinquent taxes contact: County Auditor 218-683-7000

For tax forfeit property sale contact: County Auditor 218-683-7000

For balance owed on special assessments in the City of Thief River Falls contact: City Clerk’s Office 218-681-2943

For the Building Official for the City of Thief River Falls contact: 218-681-2500

For the City Planner for the City of Thief River Falls contact: 218-681-2500