ZIP code profile · 2024 county data
ZIP Code 51357
Clay County, Iowa: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.
Data updated 2026-09-05
- 67
- Property rate /100K (county)
- 744
- Population (ZIP)
- 12
- Violent rate /100K (county)
Is ZIP code 51357 safe? Honest data snapshot
ZIP code 51357 sits within Clay County, IA. The figures below are the county's own FBI UCR numbers for 2024, the most accurate available statistic for this location, not a ZIP-specific calculation.
Clay County reported a violent-crime rate of 12 per 100,000 residents and a property-crime rate of 67 per 100,000 in 2024, drawing on county-level agency submissions.
Based on just 2 reported violent incidents across a county population of 16,384, this count is too low to support a reliable per-100K rate comparison. It may reflect a genuinely low-crime county, or it may reflect incomplete agency-level reporting to the FBI UCR Program for this county and year, small county-level counts are common in FBI Table 10 and should be treated as a data point, not a precise safety ranking.
ZIP 51357 carries a Census-reported population of 744, ranking #3 of 10 ZIPs in Clay County, spread across 37.28 square miles (about 20 people per square mile). For a full breakdown of Clay County's crime categories and year-over-year trend, see the Clay County crime page linked below.
ZIP 51357 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from Clay County agency submissions; see methodology for the ZCTA plurality map. Methodology.
ZIP 51357 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
- $60,833
- Median age
- 31.7 years
- Owner-occupied homes
- 72%
- Occupied homes
- 306
- Median home value
- $87,600
- Bachelor's degree or higher
- 19.6%
- Poverty rate
- 12.1%
- Unemployment rate
- 2.4%
ZIP 51357's median home value of $87,600 sits higher than 12% of the 841 IA ZIPs with a reported value, roughly mid-range for the state.
Source: U.S. Census Bureau, ACS 2022 5-year ZCTA estimates (income, age, housing tenure, home value, education, and unemployment).
Clay County UCR book ZIP 51357 inherits
ZIP 51357 itself is about 20 people per Census sq mi across 37.3 sq mi (744 residents), a postal settlement fact independent of the county UCR proxy.
ZIP 51357 accounts for roughly 4.5% of the county reporting population (744 of 16,384).
Clay County leans on larceny-theft at 38% of reported offenses (mix index 3,254). ZIP 51357 has no separate FBI offense book.
Clay County 2024 vs 2023: property counts -8% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.
Clay 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 51357
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.