The Washington County Treasurer’s Office sent out the 2016 Mobile Home Tax bills on April 28, 2016. A total of 172 tax bills were sent out that totaled $14,489.11. The due date for the Mobile Home Taxes is June 30, 2016. The delinquent penalty is $25.00 per month not to exceed $100.00. Mobile Home tax bills can be paid at the County Treasurer’s Office at the Courthouse Monday through Friday 8 a.m. to 4 p.m. They can also be mailed to: Washington County Treasurer, 101 East St. Louis Street, Nashville, Illinois 62263.