ZIP code 57521: Belvidere, SD
57521 is a ZIP code in Belvidere, South Dakota, mainly in Mellette County. About 314 people live here.
- Population
- 314
- Median household income
- $57,813
- Typical home value
- —
- Median rent
- —gross, per month
- Median age
- 30
- Homeowners
- 52.3%of occupied homes
Shaded: ZIP code 57521's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 57521 details
| City | Belvidere |
|---|---|
| State | South Dakota |
| County | Mellette County (also partly Jackson County) |
| Metro area | Not in a metro or micro area |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 428 sq mi, plus 2.3 sq mi of water |
| Population density | 1 people per sq mi |
| Bachelor's degree or higher | 25.1% of adults 25+ |
| Center coordinates | 43.79209, -101.18280 |
ZIP codes near 57521
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 57562 | Okaton, SD | 13.3 mi | 89 |
| 57543 | Kadoka, SD | 17.2 mi | 721 |
| 57547 | Long Valley, SD | 24.1 mi | 383 |
| 57560 | Norris, SD | 24.6 mi | 391 |
| 57579 | White River, SD | 24.7 mi | 1,277 |
| 57559 | Murdo, SD | 24.9 mi | 735 |
| 57577 | Wanblee, SD | 30.0 mi | 940 |
| 57552 | Midland, SD | 32.5 mi | 642 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
About ZIP code 57521
What city is ZIP code 57521?
ZIP code 57521 is in Belvidere, SD, in Mellette County.
What county is ZIP code 57521 in?
57521 is mainly in Mellette County, South Dakota, and partly in Jackson County.
What is the population of ZIP code 57521?
About 314 people live in ZIP code 57521, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 57521 in?
57521 is in Central Time (UTC−6). It observes daylight saving time.