Union Missouri ZIP Codes

Union holds a single ZIP code.

Every ZIP code in Union

The complete list of Union, Missouri ZIP codes with the county each falls in.
ZIP code	County
63084	Franklin County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Union codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Union. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Union ZIP code begins 630. Those first three digits identify the sectional center facility that processes mail for this part of Missouri. Statewide that range covers 65 ZIP codes, so Union accounts for 2% of it.

Every Missouri ZIP prefix and the region it covers →

Area codes covering Union

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Union occupies.

Union Missouri area codes in full →

Where Union's ZIP codes sit

Each point is one Union ZIP code, plotted from its record coordinates.

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

Cities near Union

The closest places to Union with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Washington Missouri ZIP codes	8.0 mi	1 ZIP code
Augusta Missouri ZIP codes	11 mi	1 ZIP code
Leslie Missouri ZIP codes	13 mi	1 ZIP code
Pacific Missouri ZIP codes	14 mi	1 ZIP code
Marthasville Missouri ZIP codes	14 mi	1 ZIP code
New Haven Missouri ZIP codes	17 mi	1 ZIP code
Sullivan Missouri ZIP codes	18 mi	1 ZIP code
Gerald Missouri ZIP codes	18 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.