Cass County ZIP Codes

Cass County is a county of Nebraska.

ZIP codes: 15
Cities & towns: 15
Area codes: 2
Land area: 557 sq mi

Every ZIP code in Cass County

680xx–684xx

The complete list of Cass County, NE ZIP codes with the city each one delivers to.
ZIP code	City
68016	Cedar Creek
68037	Louisville
68048	Plattsmouth
68058	South Bend
68304	Alvo
68307	Avoca
68347	Eagle
68349	Elmwood
68366	Greenwood
68403	Manley
68407	Murdock
68409	Murray
68413	Nehawka
68455	Union
68463	Weeping Water

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Cass County

Area codes covering Cass County

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

Where Cass County's ZIP codes sit

Each point is the reference point of one Cass 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 Cass 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.