Lewis and Clark County, Montana
Lewis and Clark 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 |
|---|---|---|---|
|
GUS Population: 75,129 (2024)
ID: 169417
|
County | Official County Government |
Contact: ACCOUNTING MANAGER
316 N PARK AVE, HELENA MT 59601-5026
|
|
GUS Population: 34,729 (2024)
ID: 169457
|
Municipal | Municipal Government Within County |
Contact: COMMUNITY DEVELOPMENT DIR
316 N PARK AVE, HELENA MT 59623-0001
|
|
GUS Population: 2,239 (2024)
ID: 169456
|
Municipal | Municipal Government Within County |
Contact: CLERK TREASURER
PO BOX 1170, EAST HELENA MT 59635-1170
|