State FIPS Code: 30
County FIPS Code: 43
County FIPS Class: H1
County Description:
| County Office Name | County Office Description | County Office Phone |
|---|---|---|
| Jefferson County Assessor | Jefferson County Assessor | (406) 225 - 400 |
| Jefferson County Recorder | Jefferson County Recorder | (406) 225 - 402 |
| State Mapping / GIS | State Mapping / GIS |
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