ZIP Code 53940

53940 is one of Wisconsin's ZIP codes, delivering to addresses in Lake Delton, Sauk County.

City: Lake Delton
County: Sauk County
State: Wisconsin
Prefix: 539xx

Where this code sits

53940 is part of the 539xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lake Delton.

Lake Delton Wisconsin ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 53940 delivers to without sharing its boundary.

ZIP codes nearest 53940

The ZIP codes whose reference points sit closest to 53940.
ZIP code	Distance	Delivers to
ZIP code 53965	4.1 mi	Wisconsin Dells, WI
ZIP code 53913	8.0 mi	Baraboo, WI
ZIP code 53944	8.3 mi	Lyndon Station, WI
ZIP code 53961	11 mi	Rock Springs, WI
ZIP code 53959	11 mi	Reedsburg, WI
ZIP code 53920	12 mi	Briggsville, WI
ZIP code 53951	13 mi	North Freedom, WI
ZIP code 53958	16 mi	Reedsburg, WI

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 53940, plotted from its record coordinates.

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

Scope ZIP code 53940. 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.