Bob Watt


Appointed 2017

Elected 2018, 2022


Phone:  (618) 244-8010


DEVNET (in 2023) - for taxes

CIC - for accounting

Population 2020:  37,820

Zone:  I


Welcome to Jefferson County, Illinois. 

On our county website you will find lots of helpful information including, financial statements, tax distribution reports, information about our prepayment plan, and much more. You can also pay your taxes on-line via the link found there. While you are there please check out our "Property Tax 101" series of educational posts, and the Treasurer's Recommended Links to a variety of helpful information about property taxes in Illinois. Visit us at, or you can find us on Facebook by searching for Jefferson County Treasurer - better yet just come visit us in the office.

Office Hours:

  • Real Estate and Mobile Home Taxes...........Monday - Friday 8:00 a.m. - 4:00 p.m..

Holiday Closings:

New Year's Day

Martin Luther King Day

Lincoln's Birthday

President's Day

Good Friday

Memorial Day


Independence Day

Labor Day

Columbus Day

General Election Day

Veteran's Day

Thanksgiving Day

Day After Thanksgiving Day

Christmas Eve

Christmas Day

Contact Information:

Our Location:

Jefferson County Treasurer’s Office
100 South 10th Street, Room 100
Mount Vernon, IL 62864