It is predicted that seniors will see the most population growth and make up a large portion of the additional housing needed in Willmar and Kandiyohi County by 2030. WILLMAR — There is an estimated demand for an additional 1,580 housing units in the city of Willmar between 2022 and 2030, according to an updated housing report completed by Viewpoint Consulting . Aaron Backman, executive director of the Kandiyohi County and City of Willmar Economic Development Commission, presented the report