County
· Montana
Jefferson County
Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085. Its county seat is Boulder. The county was created in 1865 and named for President Thomas Jefferson.
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Cities and towns 2
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 169415
- FIPS state
- 30
- FIPS county
- 043
- FIPS place
- 99043
- Census record name
- COUNTY OF JEFFERSON
- Mailing address
- PO BOX H, BOULDER 59632