St. Charles County ZIP codes

Every ZIP code in St. Charles County, Missouri, with the city it serves. Open any one for a free neighborhood report.

17 ZIP codes · St. Charles County, MO · FIPS 29183

ZIP codes

17 in this county

63301Saint Charles 63302Saint CharlesPO box 63303Saint Charles 63304Saint Charles 63332Augusta 63338CottlevillePO box 63341Defiance 63346Flinthillunique 63348Foristell 63365New Melle 63366O Fallon 63367Lake Saint Louis 63368O Fallon 63373Portage Des Sioux 63376Saint Peters 63385Wentzville 63386West Alton

3 of these ZIP codes route mail only. A PO-box or single-recipient ZIP has no residential area behind it, so neighborhood statistics can't be computed for it — those pages say so instead of showing numbers.