ZIP code profile · 2024 county data

ZIP Code 63304

St. Charles County, Missouri: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.

Data updated 2026-08-24

42,738
Population (ZIP)
0
Violent rate /100K (county)
0
Property rate /100K (county)

Is ZIP code 63304 safe? Honest data snapshot

ZIP code 63304 sits within St. Charles County, MO, in which law-enforcement agencies did not report complete 2024 data to the FBI UCR Program. The county figures below cover only the agencies that submitted, so they are not a measure of crime in this area and no comparison to the national average is drawn from them.

ZIP 63304 carries a Census-reported population of 42,738, ranking #7 of 14 ZIPs in St. Charles County, spread across 55.1 square miles (about 776 people per square mile). For a full breakdown of St. Charles County's crime categories and year-over-year trend, see the St. Charles County crime page linked below.

ZIP 63304 has no FBI-native crime rate (postal codes are not police jurisdictions). Figures above use the St. Charles County proxy where reported; see methodology for the ZCTA plurality map. Methodology.

ZIP 63304 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
$111,114
Median age
42.3 years
Owner-occupied homes
89%
Occupied homes
15,922

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

ZIP 63304 settlement vs St. Charles County

ZIP 63304 itself is about 776 people per Census sq mi across 55.1 sq mi (42,738 residents), a postal settlement fact independent of the county UCR proxy.

ZIP 63304 accounts for roughly 10.5% of the county reporting population (42,738 of 405,262).

St. Charles County's 2024 UCR book concentrates in aggravated assault (100% of 1 offenses; mix index 10,000). ZIP 63304 inherits that county mix, not a postal-native split.

Settlement lines use Census ZCTA figures only; incomplete county agency coverage blocks any UCR mix or rate desk for this ZIP.

Nationwide peers for ZIP 63304

Similar county violent rate (~0/100K)

Similar Census population (~42,738)

County detail: St. Charles County · State atlas: Missouri

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.