Oregon County, Missouri
Oregon 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 OREGON
GUS Population: 8,699 (2024)
ID: 168756
|
County | Official County Government |
Contact: COMMISSIONER
PO BOX 324, ALTON MO 65606-0324
|
|
CITY OF THAYER
GUS Population: 1,904 (2024)
ID: 169037
|
Municipal | Municipal Government Within County |
Contact: TAX COLLECTOR
PO BOX 76, THAYER MO 65791-0076
|
|
CITY OF ALTON
GUS Population: 702 (2024)
ID: 107677
|
Municipal | Municipal Government Within County |
Contact: CITY CLERK
PO BOX 247, ALTON MO 65606-0247
|
|
CITY OF KOSHKONONG
GUS Population: 196 (2024)
ID: 169036
|
Municipal | Municipal Government Within County |
Contact: MAYOR
PO BOX 368, KOSHKONONG MO 65692-0368
|