St. Charles County ZIP Codes

List of ZIP Codes in St. Charles County

The following table lists ZIP Codes associated with St. Charles County, Missouri, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

S.N.	Zip Code	Latitude	Longitude	City	Population	Density
1	63301	38.86159	-90.47207	Saint Charles	51,625	236.4
2	63303	38.74013	-90.54266	Saint Charles	46,627	911.3
3	63304	38.70583	-90.68666	Saint Charles	43,389	304.0
4	63332	38.60137	-90.89195	Augusta	1,676	11.5
5	63341	38.66493	-90.81783	Defiance	3,554	35.3
6	63348	38.78969	-90.94131	Foristell	10,207	70.6
7	63365	38.70961	-90.87334	New Melle	56	65.6
8	63366	38.85918	-90.71964	O'Fallon	54,449	303.4
9	63367	38.77805	-90.79536	Lake Saint Louis	27,893	831.6
10	63368	38.7516	-90.72895	O'Fallon	45,862	1092.0
11	63373	38.92776	-90.39563	Portage Des Sioux	717	14.8
12	63376	38.80022	-90.61636	Saint Peters	74,876	720.3
13	63385	38.79732	-90.85649	Wentzville	50,420	291.4
14	63386	38.87104	-90.22009	West Alton	537	6.2

About St. Charles County ZIP Codes

St. Charles County in Missouri (MO) is served by approximately 14 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.

Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 411,888 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.

Many of the most significant population centers in St. Charles County are located in cities such as Saint Charles, O'Fallon, Saint Peters, Wentzville, Lake Saint Louis. These cities and towns help define the economic and demographic character of the county.

Most ZIP Codes in St. Charles County, Missouri follow the America/Chicago time zone.

St. Charles County ZIP Codes

List of ZIP Codes in St. Charles County

About St. Charles County ZIP Codes

Missouri Counties ZIP Codes

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