ZIP code profile · 2024 county data
ZIP Code 57775
Pennington County, South Dakota: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.
Data updated 2026-08-24
- 221
- Property rate /100K (county)
- 358
- Population (ZIP)
- 130
- Violent rate /100K (county)
Is ZIP code 57775 safe? Honest data snapshot
ZIP code 57775 sits within Pennington County, SD, a county whose reported crime runs below the national average (see the county-level FBI figures below, not a ZIP-specific calculation).
Reported crime here runs well below the national average: 130 violent incidents and 221 property incidents per 100,000 residents in 2024, per county-level agency submissions.
ZIP 57775 carries a Census-reported population of 358, ranking #7 of 9 ZIPs in Pennington County, spread across 291.33 square miles (about 1 people per square mile). For a full breakdown of Pennington County's crime categories and year-over-year trend, see the Pennington County crime page linked below.
ZIP 57775 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from Pennington County agency submissions; see methodology for the ZCTA plurality map. Methodology.
ZIP 57775 Census context
These are ZIP/ZCTA demographic estimates, separate from the county-level FBI proxy above. They describe the local settlement, not a crime rate.
- Median household income
- $88,333
- Median age
- 33.5 years
- Owner-occupied homes
- 76%
- Occupied homes
- 100
Source: U.S. Census Bureau, ACS 2022 5-year ZCTA estimates (income, age, and occupied housing tenure).
How useful is the county proxy for ZIP 57775?
Within the participating-agency records for Pennington County, reported violent and property crime rates both sit below their U.S. benchmarks: violent crime is 63% below and property crime is 87% below. The two submitted measures point in the same direction, but they do not establish complete county coverage or turn the result into a ZIP-level rating for 57775. Both comparisons use the same 2024 county reporting population and FBI-submitted counts, so the two directions are internally comparable for this release, not evidence about a different year.
57775 is comparatively spread out at about 1 people per square mile. That settlement pattern may differ sharply from the county's population centers, another reason to use the county rates as regional context rather than a local estimate.
Pennington County UCR book ZIP 57775 inherits
ZIP 57775 itself is about 1 people per Census sq mi across 291.3 sq mi (358 residents), a postal settlement fact independent of the county UCR proxy.
ZIP 57775 is about 0.3% of the county reporting population (358 of 109,222), so most of the denominator and submitted incidents sit outside this postal code.
Pennington County leans on larceny-theft at 43% of reported offenses (mix index 2,718). ZIP 57775 has no separate FBI offense book.
Pennington County 2024 vs 2023: violent counts +22% vs 2023; property counts -26% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.
Pennington County offense mix (2024)
Mix index is HHI × 10,000 on county offense-type shares. Distinct from the per-100K rates in the hero; still county-agency data, not a ZIP-native FBI table.
Read with ZIP 57775
Sources: U.S. Census Bureau (ZIP population, land area, 2020 ZCTA-to-county relationship file, ACS 5-year estimates) and FBI Uniform Crime Reporting (UCR) Program, Crime in the United States (CIUS) Table 10 (county-level crime, attributed via ZIP-to-county crosswalk).
Verify with Census.gov Geography and FBI.gov UCR.
Read our methodology , how this data is sourced, computed, and verified.
Every figure on PlainCrime is rendered directly from FBI Uniform Crime Reporting (UCR) source data, no number is typed in by an editor. This page combines Census ZIP-level figures with a ZIP-to-county crosswalk to attribute FBI UCR crime data honestly, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.