Iroquois South Dakota ZIP Codes

Iroquois holds a single ZIP code.

Every ZIP code in Iroquois

The complete list of Iroquois, South Dakota ZIP codes with the county each falls in.
ZIP code	County
57353	Kingsbury 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Iroquois codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Iroquois. 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 Iroquois ZIP code begins 573. Those first three digits identify the sectional center facility that processes mail for this part of South Dakota. Statewide that range covers 62 ZIP codes, so Iroquois accounts for 2% of it.

Every South Dakota ZIP prefix and the region it covers →

Area codes covering Iroquois

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 Iroquois occupies.

605 Area code 605

Iroquois South Dakota area codes in full →

Where Iroquois's ZIP codes sit

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

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

Cities near Iroquois

The closest places to Iroquois with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Yale South Dakota ZIP codes	8.2 mi	1 ZIP code
Cavour South Dakota ZIP codes	9.5 mi	1 ZIP code
De Smet South Dakota ZIP codes	15 mi	1 ZIP code
Carthage South Dakota ZIP codes	15 mi	1 ZIP code
Huron South Dakota ZIP codes	18 mi	2 ZIP codes
Willow Lake South Dakota ZIP codes	21 mi	1 ZIP code
Erwin South Dakota ZIP codes	22 mi	1 ZIP code
Lake Preston South Dakota ZIP codes	23 mi	1 ZIP code

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