ZIP code profile · 2024 county data

ZIP Code 20817

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

Data updated 2026-08-24

37,795
Population (ZIP)
0
Violent rate /100K (county)
0
Property rate /100K (county)

Is ZIP code 20817 safe? Honest data snapshot

ZIP code 20817 sits within Montgomery County, MD, 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 20817 carries a Census-reported population of 37,795, ranking #11 of 48 ZIPs in Montgomery County, spread across 14.04 square miles (about 2,692 people per square mile). For a full breakdown of Montgomery County's crime categories and year-over-year trend, see the Montgomery County crime page linked below.

ZIP 20817 has no FBI-native crime rate (postal codes are not police jurisdictions). Figures above use the Montgomery County proxy where reported; see methodology for the ZCTA plurality map. Methodology.

ZIP 20817 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
$231,292
Median age
45.4 years
Owner-occupied homes
83%
Occupied homes
13,562

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

ZIP 20817 settlement vs Montgomery County

ZIP 20817 itself is about 2,692 people per Census sq mi across 14 sq mi (37,795 residents), a postal settlement fact independent of the county UCR proxy.

ZIP 20817 accounts for roughly 3.6% of the county reporting population (37,795 of 1,062,061).

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 20817

Similar Census population (~37,795)

County detail: Montgomery 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.

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.