Washington County is a county located in the U.S. state of Missouri. As of the most recent data available, the county has a population of approximately 23,344 people, with a population density of about 30.72 persons per square mile.
The county spans a total land area of 760.00 square miles (1,968.00 square kilometers). The administrative center and county seat is Potosi, which often serves as a hub for local governance and services. The largest city within the county by population is Potosi.
Geographically, Washington County experiences varied elevations, with its highest point at Potosi 880 ft and its lowest point at Irondale 810 ft. The region operates in the UTC-6.