Montgomery County ZIP Codes

Montgomery County is a county of Missouri.

ZIP codes: 8
Cities & towns: 8
Area codes: 3
Land area: 535 sq mi

Every ZIP code in Montgomery County

633xx–650xx

The complete list of Montgomery County, MO ZIP codes with the city each one delivers to.
ZIP code	City
63333	Bellflower
63350	High Hill
63351	Jonesburg
63359	Middletown
63361	Montgomery City
63363	New Florence
63384	Wellsville
65069	Rhineland

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Montgomery County codes above are listed without a column we would have to invent.

Cities and towns in Montgomery County

Area codes covering Montgomery County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

Where Montgomery County's ZIP codes sit

Each point is the reference point of one Montgomery County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope every ZIP code recorded in Montgomery County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.