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Where 57520 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 57520 into a pocket calculator and turn it upside down: OZSLS — not quite a word, sorry.
- ➕ As a number, 57,520 = 2 × 2 × 2 × 2 × 5 × 719. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1110000010110000 - 🏠 Its numerical neighbours: 57501 (Pierre, SD, 23 mi away) and 57521 (Belvidere, SD, 88 mi away).
- 🔄 Backwards, 57520 becomes 02575 — and that is a real ZIP code: West Tisbury, MA, 1,500 miles away.
- 👥 34 other ZIP codes are made of exactly the same digits (02557, 02575, 05257, 20557, 20575, 20755, …). The farthest-flung twin is 02557 in Oak Bluffs, MA, 1,504 miles away.
- 🧭 Farther north than 90% of all ZIP codes, and farther west than 80%.
- 🎯357 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 57520 and you would come out at 44.85°S, 79.81°E — 547 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 36m of daylight. Shortest: 8h 47m.
- 📏 At 157.4 square miles of land, 57520 is bigger than 87% of ZIP codes — room for about 120 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 118This ZIP118 |
|---|---|
| Households | 77This ZIP77 |
| Housing units | 139This ZIP139 |
| Median age | 54.8This ZIP54.8South Dakota38.0US 38.9 |
| Median household income | $50,417This ZIP$50,417South Dakota$75,081US $80,734 |
| Median home value | $118,800This ZIP$118,800South Dakota$257,400US $332,700 |
| Bachelor's degree or higher | 34.0%This ZIP34.0% |
| Mean commute | 15.0 minThis ZIP15.0 min |
| Population density | 0.7 / sq miThis ZIP0.7 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 27This ZIP27 |
| Annual payroll | $3,425,000This ZIP$3,425,000 |
Land area
| Land area | 157.43 sq miThis ZIP157.43 sq mi |
|---|---|
| Water area | 0.26 sq miThis ZIP0.26 sq mi |
Other place names in 57520
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 57520
| ZIP | City | Distance |
|---|---|---|
57564 | Onida, SD | 11.7 mi |
57442 | Gettysburg, SD | 14.5 mi |
57501 | Pierre, SD | 23.2 mi |
57522 | Blunt, SD | 26.2 mi |
57455 | Lebanon, SD | 27.2 mi |
57420 | Akaska, SD | 29.7 mi |
57450 | Hoven, SD | 30.5 mi |
57652 | Ridgeview, SD | 30.9 mi |
57601 | Mobridge, SD | 34.6 mi |
57536 | Harrold, SD | 36.5 mi |
Find every ZIP code within 10 miles of 57520 →
Questions about this ZIP code
Where is ZIP code 57520?
57520 is in Agar, South Dakota, in Sully County. Its published point location is 44.8528, -100.1937.
What county is 57520 in?
57520 lies in Sully County.
What area code is 57520?
Agar uses area code 605, from NANPA's telephone records.
What time zone is 57520 in?
57520 uses America/Chicago.
How many people live in 57520?
About 118 people live in ZIP code 57520, in 77 households, at 0.7 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 57520?
$50,417 a year, against $75,081 across South Dakota.
What ZIP codes are near 57520?
The closest are 57564 (11.7 mi), 57442 (14.5 mi), 57501 (23.2 mi), 57522 (26.2 mi) and 57455 (27.2 mi).
Is 57520 a PO Box ZIP code?
57520 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “57520 ZIP Code — Agar, South Dakota (Sully County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57520
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/57520.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.