ZIP Code 57042

57042 is one of South Dakota's ZIP codes, delivering to addresses in Madison, Lake County.

City: Madison
County: Lake County
State: South Dakota
Prefix: 570xx

Where this code sits

57042 is part of the 570xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Madison.

Madison South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57042 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57042

The ZIP codes whose reference points sit closest to 57042.
ZIP code	Distance	Delivers to
ZIP code 57075	7.8 mi	Wentworth, SD
ZIP code 57057	9.2 mi	Rutland, SD
ZIP code 57054	10 mi	Ramona, SD
ZIP code 57016	10 mi	Chester, SD
ZIP code 57050	12 mi	Nunda, SD
ZIP code 57076	12 mi	Winfred, SD
ZIP code 57017	15 mi	Colman, SD
ZIP code 57018	17 mi	Colton, SD

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 57042, plotted from its record coordinates.

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

Scope ZIP code 57042. 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.