ZIP code profile · 2024 county data

ZIP Code 77831

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

Data updated 2026-08-24

516
Property rate /100K (county)
3,095
Population (ZIP)
188
Violent rate /100K (county)

Is ZIP code 77831 safe? Honest data snapshot

ZIP code 77831 sits within Grimes County, TX, a county whose reported crime runs below the national average (see the county-level FBI figures below, not a ZIP-specific calculation).

Grimes County's reported crime sits somewhat below the national average: 188 violent and 516 property incidents per 100,000 residents in 2024.

ZIP 77831 carries a Census-reported population of 3,095, ranking #3 of 7 ZIPs in Grimes County, spread across 226.75 square miles (about 14 people per square mile). For a full breakdown of Grimes County's crime categories and year-over-year trend, see the Grimes County crime page linked below.

ZIP 77831 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from Grimes County agency submissions; see methodology for the ZCTA plurality map. Methodology.

ZIP 77831 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
$58,250
Median age
50.3 years
Owner-occupied homes
91%
Occupied homes
1,164

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 77831?

Within the participating-agency records for Grimes County, reported violent and property crime rates both sit below their U.S. benchmarks: violent crime is 47% below and property crime is 70% 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 77831. 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.

77831 is comparatively spread out at about 14 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.

Grimes County UCR book ZIP 77831 inherits

ZIP 77831 itself is about 14 people per Census sq mi across 226.8 sq mi (3,095 residents), a postal settlement fact independent of the county UCR proxy.

ZIP 77831 accounts for roughly 10.6% of the county reporting population (3,095 of 29,268).

Grimes County leans on larceny-theft at 41% of reported offenses (mix index 2,664). ZIP 77831 has no separate FBI offense book.

Grimes County 2024 vs 2023: violent counts -8% vs 2023; property counts -11% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.

Grimes 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 77831

Similar county violent rate (~188/100K)

Similar Census population (~3,095)

County detail: Grimes County · State atlas: Texas

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.