Sonja A. Olson age 75 of Monticello, WI formerly of Argyle, WI passed away Tuesday, October 13, 2015 at her home. She was born December 5, 1939 in Monroe, WI the daughter of Jesse and Alma (Olson) Hanson. Sonja lived in Argyle where she attended school, and later lived in New Glarus before moving in with her niece Susan (Brian) Hoffmaster in Monticello, WI in 1996, where she has resided since.