ZIP code profile · 2024 county data
ZIP Code 21710
Frederick County, Maryland: Census demographics for this ZIP plus the containing county's FBI UCR crime rate.
Data updated 2026-08-24
- 379
- Property rate /100K (county)
- 4,988
- Population (ZIP)
- 68
- Violent rate /100K (county)
Is ZIP code 21710 safe? Honest data snapshot
ZIP code 21710 sits within Frederick County, MD, a county whose reported crime runs below the national average (see the county-level FBI figures below, not a ZIP-specific calculation).
Reported crime here runs well below the national average: 68 violent incidents and 379 property incidents per 100,000 residents in 2024, per county-level agency submissions.
ZIP 21710 carries a Census-reported population of 4,988, ranking #16 of 28 ZIPs in Frederick County, spread across 29.38 square miles (about 170 people per square mile). For a full breakdown of Frederick County's crime categories and year-over-year trend, see the Frederick County crime page linked below.
ZIP 21710 has no FBI-native crime rate (postal codes are not police jurisdictions). The property-led county proxy above is from Frederick County agency submissions; see methodology for the ZCTA plurality map. Methodology.
ZIP 21710 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
- $158,918
- Median age
- 48.3 years
- Owner-occupied homes
- 83%
- Occupied homes
- 1,693
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 21710?
Within the participating-agency records for Frederick County, reported violent and property crime rates both sit below their U.S. benchmarks: violent crime is 81% below and property crime is 78% 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 21710. 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.
21710 is comparatively spread out at about 170 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.
Frederick County UCR book ZIP 21710 inherits
ZIP 21710 itself is about 170 people per Census sq mi across 29.4 sq mi (4,988 residents), a postal settlement fact independent of the county UCR proxy.
ZIP 21710 is about 1.8% of the county reporting population (4,988 of 271,717), so most of the denominator and submitted incidents sit outside this postal code.
Frederick County's 2024 UCR book concentrates in larceny-theft (70% of 1,213 offenses; mix index 5,103). ZIP 21710 inherits that county mix, not a postal-native split.
Frederick County 2024 vs 2023: violent counts -16% vs 2023; property counts -23% vs 2023. Year-over-year moves are county agency submissions, still not ZIP-native.
Frederick 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 21710
Similar county violent rate (~68/100K)
- ZIP 49751, MI · 67.8/100K · Otsego County
- ZIP 38105, TN · 67.8/100K · Shelby County
- ZIP 29042, SC · 67.6/100K · Bamberg County
- ZIP 38916, MS · 67.8/100K · Calhoun County
Similar Census population (~4,988)
- ZIP 60461, IL · 4,988 pop · Δ0
- ZIP 24563, VA · 4,987 pop · Δ1
- ZIP 30629, GA · 4,990 pop · Δ2
- ZIP 35175, AL · 4,986 pop · Δ2
County detail: Frederick County · State atlas: Maryland
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.