Welcome to O'Fallon, Missouri

I Want To...

Government

Departments

Services

Things to Do

Welcome to O'Fallon, Missouri
English English
Explore
O'Fallon

O'Fallon Municipal Centre
100 North Main Street
O'Fallon, MO 63366
Phone:  636-240-2000
Hours:  Mon. – Fri.: 8:30 a.m. – 4:30 p.m.