Washington County residents have until the end of the month to pay real-estate and mobile home taxes. Payments can be made in person or mailed to the Washington County Treasurer’s Office. They can also be paid online at www.iowatreasurers.org Payments that are mailed in must be postmarked by March 31 to avoid a penalty. Taxes that remain unpaid on June 21, will be offered at the annual tax sale. For more information contact the Washington County Treasurer’s Office.