Jefferson County Seal
Jefferson County,
Missouri
Est. 1818
Photo of Rockford Beach Photo of Admin Building Photo of Annex Building Photo of Court House Photo of Soccer Game Photo of Detention Center Photo of Justice Center Photo of Law Enforcement Memorial Photo of Child Fishing Photo of Sheriff Dept Jail Photo of Sheriff East Zone building Photo of Sheriff North Zone building

Welcome to
Jefferson County's website

Welcome to Jeffcomo.org, your online connection to Jefferson County, Missouri government. Here you will find information on all Jefferson County Government departments and services as well as Jefferson County elected officials. We continue to work hard to provide you with easy access to information about County government. This website is just a part of Jefferson County’s commitment to providing and maintaining open and transparent County government. Please check back periodically as we will have ongoing improvements. Thank you for visiting Jefferson County online.

 

 

Jefferson County Emergency Hours of Operation 
Monday - Friday 8:00 a.m. - 5:00 p.m.

Please see link below regarding closure of County Offices 

County Information Line and Department Directory: 636-797-5555  

 

 

Temporary Requirements for Public Access to County Buildings 

 

                

 

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August 4, 2020 Election Information
View your Sample Ballot, a County Wide Sample Ballot, Absentee Applications and more important election information.
US Census 2020
Jefferson County, MO Counts US Census 2020
Warming Centers in Jefferson County
A list of local warming centers.
Upcoming Events
7/23/20206:30 p.m. Planning & Zoning Meeting
 6:30 p.m. Planning & Zoning Meeting