ZIP code profile · 2024 county data

ZIP Code 08540

Mercer County, New Jersey: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.

Data updated 2026-08-24

48,513
Population (ZIP)
1
Violent rate /100K (county)
1
Property rate /100K (county)

Is ZIP code 08540 safe? Honest data snapshot

ZIP code 08540 sits within Mercer County, NJ, 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 08540 is the largest ZIP in Mercer County by population, 48,513 residents (#1 of 22 county ZIPs), across 51.72 square miles (938/sq mi). For a full breakdown of Mercer County's crime categories and year-over-year trend, see the Mercer County crime page linked below.

ZIP 08540 has no FBI-native crime rate (postal codes are not police jurisdictions). Figures above use the Mercer County proxy where reported; see methodology for the ZCTA plurality map. Methodology.

ZIP 08540 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
$161,018
Median age
40.3 years
Owner-occupied homes
64%
Occupied homes
17,578

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

ZIP 08540 settlement vs Mercer County

ZIP 08540 itself is about 938 people per Census sq mi across 51.7 sq mi (48,513 residents), a postal settlement fact independent of the county UCR proxy.

ZIP 08540 accounts for roughly 12.5% of the county reporting population (48,513 of 387,340).

Mercer County leans on larceny-theft at 50% of reported offenses (mix index 3,889). ZIP 08540 has no separate FBI offense book.

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 08540

Similar county violent rate (~1/100K)

Similar Census population (~48,513)

County detail: Mercer County · State atlas: New Jersey

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.