Cristina M Wilks (Postmaster)
cristina.m.wilks@usps.gov
800 Columbia Center
Columbia, IL 62236
Columbia, IL 62236
The Columbia Post Office is located in the state of Illinois within Monroe County. This location serves 12,562 Columbia residents with a median income of $70,396. It's estimated that approximately 20,050 packages pass through this post office each year.