Overview
Jefferson County is a county of Missouri, United States (FIPS mo099), with a population of about 226,739[1].
Geography
- Coordinates: 38.2611, -90.5377
- Time zone: America/Chicago
Places · place_us_mo_jefferson_county
Jefferson County is a county of Missouri, United States.
Jefferson County is a county of Missouri, United States (FIPS mo099), with a population of about 226,739[1].