Saint Charles County, Missouri — ZIP directory
10 ZIP codes in Saint Charles County. Pick a ZIP for services, power context, permits, and FAQs written for homeowners.
- Saint Charles 63301 — Saint Charles
- Saint Charles 63303 — Saint Charles
- Saint Charles 63304 — Saint Charles
- Defiance 63341 — Defiance
- Foristell 63348 — Foristell
- O Fallon 63366 — O Fallon
- Lake Saint Louis 63367 — Lake Saint Louis
- O Fallon 63368 — O Fallon
- Saint Peters 63376 — Saint Peters
- Wentzville 63385 — Wentzville