ZIP code profile · 2024 county data
ZIP Code 03237
Belknap County, New Hampshire: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.
Data updated 2026-08-24
- 2,338
- Population (ZIP)
- 3
- Violent rate /100K (county)
- 13
- Property rate /100K (county)
Is ZIP code 03237 safe? Honest data snapshot
ZIP code 03237 sits within Belknap County, NH, 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 03237 carries a Census-reported population of 2,338, ranking #9 of 13 ZIPs in Belknap County, spread across 37.96 square miles (about 62 people per square mile). For a full breakdown of Belknap County's crime categories and year-over-year trend, see the Belknap County crime page linked below.
ZIP 03237 has no FBI-native crime rate (postal codes are not police jurisdictions). Figures above use the Belknap County proxy where reported; see methodology for the ZCTA plurality map. Methodology.
ZIP 03237 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
- $98,542
- Median age
- 42.5 years
- Owner-occupied homes
- 93%
- Occupied homes
- 885
Source: U.S. Census Bureau, ACS 2022 5-year ZCTA estimates (income, age, and occupied housing tenure).
ZIP 03237 settlement vs Belknap County
ZIP 03237 itself is about 62 people per Census sq mi across 38 sq mi (2,338 residents), a postal settlement fact independent of the county UCR proxy.
ZIP 03237 accounts for roughly 3.7% of the county reporting population (2,338 of 63,705).
Belknap County's 2024 UCR book concentrates in larceny-theft (80% of 10 offenses; mix index 6,600). ZIP 03237 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 03237
Similar county violent rate (~3/100K)
- ZIP 12137, NY · 3.2/100K · Schenectady County
- ZIP 28032, NC · 3.1/100K · Gaston County
- ZIP 05843, VT · 3.3/100K · Caledonia County
- ZIP 11976, NY · 2.9/100K · Suffolk County
Similar Census population (~2,338)
- ZIP 62890, IL · 2,338 pop · Δ0
- ZIP 71039, LA · 2,338 pop · Δ0
- ZIP 12207, NY · 2,337 pop · Δ1
- ZIP 23919, VA · 2,337 pop · Δ1
County detail: Belknap County · State atlas: New Hampshire
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.