Assessor: Debbie Summers 102 N Missouri St Potosi, MO 63664 Phone: (573) 438-6111 ext 5 Fax: (573) 436-0014 Website
QUICK FACTS: -Washington County is a county located in the southeastern part of the U.S. state of Missouri. As of the 2010 census, the population was 25,195. The county seat and largest city is Potosi.Wikipedia
