ZIP code profile · 2024 county data

ZIP Code 50621

Grundy County, Iowa: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.

Data updated 2026-08-24

308
Property rate /100K (county)
1,641
Population (ZIP)
105
Violent rate /100K (county)

Is ZIP code 50621 safe? Honest data snapshot

ZIP code 50621 sits within Grundy 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.

Grundy County reported a violent-crime rate of 105 per 100,000 residents and a property-crime rate of 308 per 100,000 in 2024, drawing on county-level agency submissions.

Based on just 13 reported violent incidents across a county population of 12,329, 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 50621 carries a Census-reported population of 1,641, ranking #4 of 9 ZIPs in Grundy County, spread across 62.89 square miles (about 26 people per square mile). For a full breakdown of Grundy County's crime categories and year-over-year trend, see the Grundy County crime page linked below.

ZIP 50621 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from Grundy County agency submissions; see methodology for the ZCTA plurality map. Methodology.

ZIP 50621 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
$74,018
Median age
49.8 years
Owner-occupied homes
76%
Occupied homes
661

Source: U.S. Census Bureau, ACS 2022 5-year ZCTA estimates (income, age, and occupied housing tenure).

Grundy County UCR book ZIP 50621 inherits

ZIP 50621 itself is about 26 people per Census sq mi across 62.9 sq mi (1,641 residents), a postal settlement fact independent of the county UCR proxy.

ZIP 50621 accounts for roughly 13.3% of the county reporting population (1,641 of 12,329).

Grundy County leans on burglary at 45% of reported offenses (mix index 3,272). ZIP 50621 has no separate FBI offense book.

Grundy County 2024 vs 2023: property counts +153% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.

Grundy 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 50621

Similar county violent rate (~105/100K)

Similar Census population (~1,641)

County detail: Grundy 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.