Jefferson County Seal
Jefferson County,
Missouri
Est. 1818
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Jefferson County, Missouri, Executive

 

 

 

                                                                        

Dennis Gannon, County Executive

    Email:   DGannon@jeffcomo.org

Mailing Address:  

PO Box 100

Hillsboro, MO 63050

Phone:  636-797-5400

Fax:       636-797-5506

                                 

Physical Address: 

Jefferson County Administration Center

729 Maple Street, Suite G30
Hillsboro, MO 63050
  

Office Hours:       

8:00 a.m. to 5:00 p.m.

Monday - Friday

 

 

 

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