Belvidere, SD

ZIP code 57521 is assigned to Belvidere, SD, and falls within Jackson County. Like every US postal code, it began as a mail-routing device rather than a geographic boundary — the US Postal Service groups delivery routes under a single code so carriers and sorting equipment can process mail efficiently. Today it also serves as a practical shorthand for the area itself: roughly 245 people live inside it.

At 1 residents per square mile spread over 427.978 square miles, 57521 reads as a rural area. It is a sparsely populated postal code, and density shapes almost everything else on this page — how people get to work, whether they own or rent, and what housing costs.

Household earnings run below the national median. At $50,521, 57521 sits in the lower half, ahead of 17% of them. The US median for comparison is $70,109. Bear in mind that median income describes the midpoint household, not the average — it is not pulled upward by a handful of very high earners the way a mean would be.

Housing in 57521 costs well below the national median. A typical home is valued at $37,100 against a US median of $207,500. The split between owning and renting is fairly even at 51.0% owner-occupied, which tends to indicate a mix of housing types rather than one dominant form.

The building stock is dominated by detached single-family houses, which account for 73.6% of housing units here. The median construction year is 1971, making the housing here from the later twentieth century. The vacancy rate of 41.4% is high, which in many places reflects seasonal or second-home use rather than abandonment.

The population skews notably young, with a median age of 14.5 against 42 nationally. Households are relatively large at 4.8 people on average, with 74.5% classified as family households.

Getting to work takes 22.2 minutes on average one way. The dominant mode is drove alone at 83.3% of workers, while 16.7% work from home. Commute patterns are one of the better proxies for how a place actually functions day to day.

Beyond addressing mail, 57521 does a lot of quiet administrative work. Retailers use it to calculate shipping and sales tax at checkout. Insurers use it to set premiums, since risk profiles vary geographically. Employers and marketers use it to define service areas. Government agencies use it to route benefits and organise reporting. If you have ever been asked for a postal code by a form that clearly does not intend to send you anything, this is why.

For anyone weighing a move, 57521 offers a compact profile of Belvidere: 245 residents, a median household income of $50,521, 11.4% of adults holding a bachelor's degree or higher, and an unemployment rate of 0.0%. A handful of figures like these answer more relocation questions than most neighbourhood guides do.

One caution worth repeating: a postal code is not a neighbourhood. 57521 may cover parts of several distinct areas, and a single neighbourhood in Belvidere may be split across more than one code. Boundaries also shift as USPS adjusts delivery routes. Treat the figures here as describing a delivery area, which is what they actually measure.