Jefferson County
URL: https://knowledge.ivjn.us/en/places/mt-jefferson-county.html

Jefferson County is a county of Montana, United States.

## Overview

Jefferson County is a county of [Montana](https://knowledge.ivjn.us/en/places/montana.html), United States (FIPS mt043), with a population of about 12,085[^geonames].

## Geography

- Coordinates: 46.1485, -112.0937
- Time zone: America/Denver

Updated: 2026-10-29

Relations:
- Located in: Montana https://knowledge.ivjn.us/en/places/montana.html
- Contains places: Elkhorn https://knowledge.ivjn.us/en/places/mt-elkhorn.html
- Contains places: Basin https://knowledge.ivjn.us/en/places/mt-basin.html
- Contains places: Boulder https://knowledge.ivjn.us/en/places/mt-boulder.html
- Contains places: Cardwell https://knowledge.ivjn.us/en/places/mt-cardwell.html
- Contains places: Clancy https://knowledge.ivjn.us/en/places/mt-clancy.html
- Contains places: Jefferson City https://knowledge.ivjn.us/en/places/mt-jefferson-city.html
- Contains places: Montana City https://knowledge.ivjn.us/en/places/mt-montana-city.html
- Contains places: Whitehall https://knowledge.ivjn.us/en/places/mt-whitehall.html
- Contains places: South Hills https://knowledge.ivjn.us/en/places/mt-south-hills.html

Mentioned in:
- Basin https://knowledge.ivjn.us/en/places/mt-basin.html
- Boulder https://knowledge.ivjn.us/en/places/mt-boulder.html
- Cardwell https://knowledge.ivjn.us/en/places/mt-cardwell.html
- Clancy https://knowledge.ivjn.us/en/places/mt-clancy.html
- Elkhorn https://knowledge.ivjn.us/en/places/mt-elkhorn.html
- Jefferson City https://knowledge.ivjn.us/en/places/mt-jefferson-city.html
- Montana City https://knowledge.ivjn.us/en/places/mt-montana-city.html
- South Hills https://knowledge.ivjn.us/en/places/mt-south-hills.html
- Whitehall https://knowledge.ivjn.us/en/places/mt-whitehall.html

Sources:
- GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip