There are 14 zip codes in St. Charles County, Missouri. The most populated is 63376, located in Saint Peters. * 2024 populations estimated based on the latest ACS 5-year data.

CSV JSON

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Zip Code
Population
City
6337674,967Saint Peters
6336652,746O'Fallon
6330151,401Saint Charles
6338548,535Wentzville
6330347,285Saint Charles
6336846,124O'Fallon
6330442,738Saint Charles
6336727,371Lake Saint Louis
6334810,555Foristell
633413,628Defiance
633321,742Augusta
63373687Portage Des Sioux
63386522West Alton
6336566New Melle

Zip Codes in St. Charles County, Missouri by Population (2024)