ZIP code profile · 2024 county data

ZIP Code 98584

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

Data updated 2026-08-24

902
Property rate /100K (county)
38,615
Population (ZIP)
202
Violent rate /100K (county)

Is ZIP code 98584 safe? Honest data snapshot

ZIP code 98584 sits within Mason County, WA, a county whose reported crime runs below the national average (see the county-level FBI figures below, not a ZIP-specific calculation).

Mason County's reported crime sits somewhat below the national average: 202 violent and 902 property incidents per 100,000 residents in 2024.

ZIP 98584 is the largest ZIP in Mason County by population, 38,615 residents (#1 of 9 county ZIPs), across 359.48 square miles (107/sq mi). For a full breakdown of Mason County's crime categories and year-over-year trend, see the Mason County crime page linked below.

ZIP 98584 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from Mason County agency submissions; see methodology for the ZCTA plurality map. Methodology.

ZIP 98584 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
$69,489
Median age
40.7 years
Owner-occupied homes
75%
Occupied homes
14,102

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 98584?

Within the participating-agency records for Mason County, reported violent and property crime rates both sit below their U.S. benchmarks: violent crime is 43% below and property crime is 47% 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 98584. 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.

Within the county, 98584 is one of the most populous ZIPs (#1 of 9). Its 38,615 residents therefore represent a comparatively large share of the local population, but the county total still combines reports from places outside this ZIP.

Mason County UCR book ZIP 98584 inherits

ZIP 98584 itself is about 107 people per Census sq mi across 359.5 sq mi (38,615 residents), a postal settlement fact independent of the county UCR proxy.

ZIP 98584's 38,615 residents are about 58.8% of the 2024 county reporting population (65,726), a large postal share of a county-wide rate.

Mason County leans on larceny-theft at 48% of reported offenses (mix index 3,185). ZIP 98584 has no separate FBI offense book.

Mason County 2024 vs 2023: violent counts +51% vs 2023; property counts -4% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.

Mason 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 98584

Similar county violent rate (~202/100K)

Similar Census population (~38,615)

County detail: Mason County · State atlas: Washington

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.