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Home The Kandiyohi County Historical Society is located on the North edge of Willmar Minnesota and across from Willmar Lake and Robbins Island Mona Nelson Internship Program. The deadline to apply is February 28 2025. more information The Mona Nelson Internship Program is set in memory of Mona Nelson the longtime executive director of the Kandiyohi County Historical Society. Mona was a leader and mentor in the Minnesota local history field.