| Business | Phone |
| Jefferson County Circuit Judge 100 S 10th St, Mt. Vernon 62864 | (618) 244-8005 |
| Jefferson Cnty Co-Op Extension 4620 Broadway St, Mt. Vernon 62864 | (618) 242-0780 |
| Jefferson County Assessments 100 S 10th St 2, Mt. Vernon 62864 | (618) 244-8016 |
| Jefferson County Board-Sprvsrs 100 S 10th St, Mt. Vernon 62864 | (618) 244-8000 |
| Jefferson County Circuit Clerk 100 S 10th St, Mt. Vernon 62864 | (618) 244-8008 |
| Jefferson County Recorder 100 S 10th St 105, Mt. Vernon 62864 | (618) 244-8020 |
| Jefferson Fire Protection Dist 1600 S 10th St, Mt. Vernon 62864 | (618) 244-3824 |