ZIP code profile · 2024 county data
ZIP Code 51046
O'Brien County, Iowa: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.
Data updated 2026-08-24
- 261
- Property rate /100K (county)
- 1,432
- Population (ZIP)
- 85
- Violent rate /100K (county)
Is ZIP code 51046 safe? Honest data snapshot
ZIP code 51046 sits within O'Brien 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.
O'Brien County reported a violent-crime rate of 85 per 100,000 residents and a property-crime rate of 261 per 100,000 in 2024, drawing on county-level agency submissions.
Based on just 12 reported violent incidents across a county population of 14,182, 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 51046 carries a Census-reported population of 1,432, ranking #3 of 8 ZIPs in O'Brien County, spread across 93.26 square miles (about 15 people per square mile). For a full breakdown of O'Brien County's crime categories and year-over-year trend, see the O'Brien County crime page linked below.
ZIP 51046 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from O'Brien County agency submissions; see methodology for the ZCTA plurality map. Methodology.
ZIP 51046 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
- $74,327
- Median age
- 48.7 years
- Owner-occupied homes
- 75%
- Occupied homes
- 699
Source: U.S. Census Bureau, ACS 2022 5-year ZCTA estimates (income, age, and occupied housing tenure).
O'Brien County UCR book ZIP 51046 inherits
ZIP 51046 itself is about 15 people per Census sq mi across 93.3 sq mi (1,432 residents), a postal settlement fact independent of the county UCR proxy.
ZIP 51046 accounts for roughly 10.1% of the county reporting population (1,432 of 14,182).
O'Brien County leans on larceny-theft at 53% of reported offenses (mix index 3,578). ZIP 51046 has no separate FBI offense book.
O'Brien County 2024 vs 2023: property counts +23% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.
O'Brien 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.
Nationwide peers for ZIP 51046
Similar county violent rate (~85/100K)
- ZIP 30678, GA · 84.6/100K · Greene County
- ZIP 77983, TX · 84.6/100K · Calhoun County
- ZIP 80045, CO · 84.7/100K · Adams County
- ZIP 76453, TX · 84.5/100K · Palo Pinto County
Similar Census population (~1,432)
- ZIP 26283, WV · 1,432 pop · Δ0
- ZIP 31798, GA · 1,432 pop · Δ0
- ZIP 47281, IN · 1,432 pop · Δ0
- ZIP 69339, NE · 1,432 pop · Δ0
County detail: O'Brien County · State atlas: Iowa
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.