Washington County, Missouri
Washington County profile, demographic data, and geographic information.
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
COUNTY OF WASHINGTON
GUS Population: 23,583 (2024)
ID: 168775
|
County | Official County Government |
Contact: COMMISSIONER
102 N MISSOURI ST, POTOSI MO 63664-1799
|
|
CITY OF POTOSI
GUS Population: 2,549 (2024)
ID: 169213
|
Municipal | Municipal Government Within County |
Contact: MAYOR
121 E HIGH ST, POTOSI MO 63664-1906
|
|
CITY OF IRONDALE
GUS Population: 368 (2024)
ID: 169212
|
Municipal | Municipal Government Within County |
Contact: CITY CLERK
PO BOX 53, IRONDALE MO 63648-0053
|
|
TOWN OF MINERAL POINT
GUS Population: 234 (2024)
ID: 129624
|
Municipal | Municipal Government Within County |
Contact: CHAIRPERSON
PO BOX 127, MINERAL POINT MO 63660-0127
|
|
VILLAGE OF CALEDONIA
GUS Population: 132 (2024)
ID: 169211
|
Municipal | Municipal Government Within County |
Contact: MAYOR
PO BOX 100, CALEDONIA MO 63631-0100
|