Polk County is located in northwestern Wisconsin near Balsam Lake hosting an estimated population calculated at 43 471 citizens according to 2019 census report . Local attractions include : Interstate state park – unique 120-acre park comprising diverse glacial topography including rock formations , gorges , streams and pools surrounded by hardwood forest perfect for day trips ; Amery Free Library – historical library containing more than 25 thousand items like books, DVD’s and genealogy records providing educational opportunity to visitors; Polk County Historical Society Museum – repository full of artifacts related to county history displaying collections like photos , furniture or historic documents ; Kinni Creek Lodge & Outfitters - rustic retreat comprising amenities like public showers , laundry service or fully equipped kitchen open year round.