ZIP Code 57446

57446 is one of South Dakota's ZIP codes, delivering to addresses in Hecla, Brown County.

City: Hecla
County: Brown County
State: South Dakota
Prefix: 574xx

Where this code sits

57446 is part of the 574xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Hecla.

Hecla South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57446 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57446

The ZIP codes whose reference points sit closest to 57446.
ZIP code	Distance	Delivers to
ZIP code 57449	7.0 mi	Houghton, SD
ZIP code 57421	15 mi	Amherst, SD
ZIP code 57441	16 mi	Frederick, SD
ZIP code 57432	16 mi	Claremont, SD
ZIP code 57433	16 mi	Columbia, SD
ZIP code 58474	17 mi	Oakes, ND
ZIP code 57426	18 mi	Barnard, SD
ZIP code 58436	18 mi	Ellendale, ND

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 57446, plotted from its record coordinates.

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

Scope ZIP code 57446. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.