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US ZIP Code Profile

ZIP Code 20817
Bethesda, Maryland

ZIP code 20817 is in Bethesda, located in Montgomery County, Maryland, within the Washington-Arlington-Alexandria metro area. Its 2020 Census population was 38,908. The estimated median adjusted gross income per tax return is $159,531, and about 43% of filers report $200,000 or more.

2020 Population
38,908
Census ZCTA
County
Montgomery
FIPS 24031
Median income (est.)
$159,531
IRS SOI 2022
Land Area
13.889 mi²
+ 0.075 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityBethesda, MD
CountyMontgomery County (FIPS 24031)
StateMaryland (FIPS 24)
Metro Area (MSA)Washington-Arlington-Alexandria, DC-VA-MD-WV Metro Area (47900)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates38.99728, -77.15182
Land / Water Area13.889 mi² land · 0.075 mi² water

02Income & Economics

Distribution of the 17,490 individual tax returns filed in 20817 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
18.5%
$25K–$50K
8.3%
$50K–$75K
6.5%
$75K–$100K
5.8%
$100K–$200K
18.3%
$200K+
42.6%
The $200,000+ bracket accounts for 88% of 20817's total adjusted gross income, from 43% of returns — a concentration that drives the gap between the median ($159,531) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 20817's IRS income metrics, 2020–2022.

Median income (2021→2022)
$159,531
▼ 0.5%
Filers earning $200K+
42.6%
▼ 0.3 pt
Total filers
17,490
▲ 2.9%
GET /zipc/v2/zipcodes/20817/soi?year=… $143K 2020 $160K 2021 $160K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 20817 ZCTA.

2000
35,105
 
2010
36,240
▲ +3.2%
2020
38,908
▲ +7.4%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 20817. Powered by the same radius endpoint developers call from the API.

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ZIP codes within range of 20817

Bethesda and its immediate neighbors, sorted by distance.

3 mi
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Distance from 20817 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortB
USPS Finance Number230675
City AliasesBethesda, Westlake

07Frequently Asked Questions

What county is ZIP code 20817 in?

ZIP code 20817 is in Montgomery County, Maryland (county FIPS code 24031).

What city is ZIP code 20817?

The primary USPS city for 20817 is Bethesda, MD.

What metro area (MSA) is 20817 in?

20817 is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metro Area (MSA code 47900).

What is the population of ZIP code 20817?

The 2020 Census population of 20817 was 38,908 residents.

What is the median income in ZIP code 20817?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 20817 is about $159,531, with around 43% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.