The Treasurer of Polk County s office, administered by Polk County Government, issues vehicle titles and registrations. It specializes in the collection of vehicle fees for residents of Polk County in Iowa. The office processes more than 759,000 vehicle transactions and responds to over 120,000 telephone inquiries on an annual basis. The Treasurer of Polk County s office also collects property taxes for parcels, mobile homes and special assessments. It provides financial administration and services for banking, cash management and investments. In addition, the office operates administration and cash management divisions. The Treasurer of Polk County s prepares plat and mobile home tax clearances.