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Willow Lake South Dakota ZIP Codes

Willow Lake holds a single ZIP code.

Every ZIP code in Willow Lake

The complete list of Willow Lake, South Dakota ZIP codes with the county each falls in.
ZIP codeCounty
57278Clark 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Willow Lake codes above are listed without a column we would have to invent.

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

How these codes cluster

Every Willow Lake ZIP code begins 572. Those first three digits identify the sectional center facility that processes mail for this part of South Dakota. Statewide that range covers 56 ZIP codes, so Willow Lake accounts for 2% of it.

Every South Dakota ZIP prefix and the region it covers →

Area codes covering Willow Lake

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 Willow Lake occupies.

Willow Lake South Dakota area codes in full →

Where Willow Lake's ZIP codes sit

Each point is one Willow Lake ZIP code, plotted from its record coordinates.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Cities near Willow Lake

The closest places to Willow Lake with their own ZIP code list, nearest first.
CityDistanceZIP codes
Vienna South Dakota ZIP codes8.5 mi1 ZIP code
Bryant South Dakota ZIP codes8.8 mi1 ZIP code
Erwin South Dakota ZIP codes14 mi1 ZIP code
Hazel South Dakota ZIP codes16 mi1 ZIP code
De Smet South Dakota ZIP codes17 mi1 ZIP code
Clark South Dakota ZIP codes18 mi1 ZIP code
Henry South Dakota ZIP codes20 mi1 ZIP code
Iroquois South Dakota ZIP codes21 mi1 ZIP code

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