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Where 57042 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 57042 into a pocket calculator and turn it upside down: ZhOLS — not quite a word, sorry.
- ➕ As a number, 57,042 = 2 × 3 × 3 × 3169. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1101111011010010 - 🏠 Its numerical neighbours: 57041 (Lyons, SD, 22 mi away) and 57043 (Marion, SD, 39 mi away).
- 🔄 Backwards, 57042 becomes 24075, which is not a ZIP code at all.
- 👥 58 other ZIP codes are made of exactly the same digits (02457, 02475, 02574, 02745, 04257, 04275, …). The farthest-flung twin is 04572 in Waldoboro, ME, 1,372 miles away.
- 🧭 Farther north than 87% of all ZIP codes, and farther west than 74%.
- 🎯296 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57042 and you would come out at 43.97°S, 82.86°E — 704 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 29m of daylight. Shortest: 8h 53m.
- 📏 At 193.2 square miles of land, 57042 is bigger than 90% of ZIP codes — room for about 147 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 7,756This ZIP7,756 |
|---|---|
| Households | 3,331This ZIP3,331 |
| Housing units | 3,800This ZIP3,800 |
| Median age | 43.1This ZIP43.1South Dakota38.0US 38.9 |
| Median household income | $71,868This ZIP$71,868South Dakota$75,081US $80,734 |
| Median home value | $228,200This ZIP$228,200South Dakota$257,400US $332,700 |
| Median gross rent | $963This ZIP$963South Dakota$946US $1,413 |
| Bachelor's degree or higher | 36.6%This ZIP36.6% |
| Mean commute | 12.6 minThis ZIP12.6 min |
| Population density | 40.1 / sq miThis ZIP40.1 / sq mi |
Business and tax activity
| Business establishments | 272This ZIP272 |
|---|---|
| Employees | 3,517This ZIP3,517 |
| Annual payroll | $182,885,000This ZIP$182,885,000 |
| Tax returns filed | 3,990This ZIP3,990 |
| Total adjusted gross income | $314,727,000This ZIP$314,727,000 |
Land area
| Land area | 193.22 sq miThis ZIP193.22 sq mi |
|---|---|
| Water area | 3.71 sq miThis ZIP3.71 sq mi |
Counties 57042 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Lake County | 99.2% |
| McCook County | 0.8% |
Other place names in 57042
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57042
| ZIP | City | Distance |
|---|---|---|
57075 | Wentworth, SD | 9.0 mi |
57076 | Winfred, SD | 10.7 mi |
57016 | Chester, SD | 11.3 mi |
57054 | Ramona, SD | 11.6 mi |
57057 | Rutland, SD | 12.9 mi |
57050 | Nunda, SD | 14.2 mi |
57018 | Colton, SD | 14.5 mi |
57048 | Montrose, SD | 16.1 mi |
57017 | Colman, SD | 16.7 mi |
57061 | Sinai, SD | 19.5 mi |
Find every ZIP code within 10 miles of 57042 →
Questions about this ZIP code
Where is ZIP code 57042?
57042 is in Madison, South Dakota, in Lake County. Its published point location is 43.9713, -97.1441.
What county is 57042 in?
57042 spans 2 counties: Lake County and McCook County. Most of it falls in Lake County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 57042?
Madison uses area code 605, from NANPA's telephone records.
What time zone is 57042 in?
57042 uses America/Chicago.
How many people live in 57042?
About 7,756 people live in ZIP code 57042, in 3,331 households, at 40.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 57042?
$71,868 a year, against $75,081 across South Dakota.
What ZIP codes are near 57042?
The closest are 57075 (9 mi), 57076 (10.7 mi), 57016 (11.3 mi), 57054 (11.6 mi) and 57057 (12.9 mi).
Is 57042 a PO Box ZIP code?
57042 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57042 ZIP Code — Madison, South Dakota (Lake County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57042
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57042.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.