Grainfield Kansas ZIP Codes

Grainfield holds a single ZIP code.

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Scope every ZIP code recorded for Grainfield. 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.

Every Grainfield ZIP code begins 677. Those first three digits identify the sectional center facility that processes mail for this part of Kansas. Statewide that range covers 28 ZIP codes, so Grainfield accounts for 4% of it.

Every Kansas ZIP prefix and the region it covers →

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

• 785 Area code 785

Grainfield Kansas area codes in full →

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