Residential delivery area · Maryland
ZIP Code 20837: Poolesville, MD
ZIP code 20837 uses the postal name Poolesville, Maryland and lies entirely in Montgomery County (Census 2020 ZIP-county file). About 6,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $174,063 (Census Bureau, ACS 2020-2024). By Census place, 10% of its land lies in Poolesville; 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Poolesville · its only residential ZIP
- County
- Montgomery County
- Census places
- Poolesville
- Neighborhoods
- Seneca Chase, Wesmond, Westerly GeoNames
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- House district
- MD-6 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 40.3 sq mi · 166 people per sq mi
Where is ZIP code 20837?
20837 centers on 39.117°, -77.407° and covers 40.3 square miles of land plus 3.1 of water. It borders 7 ZIP codes: 20165, 20839, 20842, 20874, 20147, 20841, 20176.
The map draws ZIP code areas only. For the streets inside 20837, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 20837 compare with the rest of Montgomery County?
| Measure | 20837 | In Montgomery County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 6,699 | 37th of 53 | 212th of 477 |
| Median household income | $174k | 13th of 41 | 25th of 293 |
| Median home value | $772k | 12th of 41 | 20th of 320 |
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 60% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 20837?
The 2020 Census counted 6,634 people in 20837; the ACS, which samples households over 2020-2024, estimates 6,699. Between the 2010 and 2020 censuses its population grew 14.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,699
- 2020 Census count
- 6,634+14.6% since 2010 (5,789)
- Households
- 2,366
- Median age
- 45.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 20837?
Of the 6,699 people the ACS estimates in 20837, 21.3% are under 18 and 17.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (70.1%), then Hispanic or Latino (13.1%).
- Under 1821.3%
- 18 to 6461.3%
- 65 and older17.3%
- White, not Hispanic70.1%
- Hispanic or Latino13.1%
- Other or two or more7.2%
- Asian, not Hispanic6.9%
- Black, not Hispanic2.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 20837 earn?
Median household income is $174,063 (ACS 2020-2024), the 13th highest of the 41 ranked ZIP codes in Montgomery County. It is not measurably different from 2015-2019 ($205,850 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $174,063±$40,750
- Income per person
- $71,211
- Below the poverty line
- 8.7%
- Unemployed (of the labor force)
- 3.6%
- Adults 25+ with a bachelor's degree
- 57.1%
- Adjusted gross income per tax return, 2022
- $141,0373,330 returns; wages 73% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 20837?
FHFA's house price index for 20837, built from repeat sales and appraisals of the same homes, rose 57% from 2015 to 2025 and rose 44% from 2020 to 2025, and moved +0.3% in 2025.
- Median home value (owners' estimate)
- $772,300
- Median gross rent
- $1,996
- Homes owned by their occupants
- 91.9%
- Housing units
- 2,422
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 20837?
121 business establishments had a location in this ZIP code in 2023, 9 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services26
- Construction17
- Other services (except public administration)12
- Retail trade11
- Administrative and support and waste management and remediation services10
- Health care and social assistance10
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 20837?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20165 | Sterling, VA | 34,088 | $183k | 4.2 mi |
| 20839 | Beallsville | 158 | $160k | 4.7 mi |
| 20842 | Dickerson | 2,369 | $204k | 5.8 mi |
| 20874 | Germantown | 62,738 | $115k | 5.8 mi |
| 20147 | Ashburn, VA | 67,692 | $164k | 6.4 mi |
| 20841 | Boyds | 9,969 | $185k | 6.4 mi |
| 20176 | Leesburg, VA | 51,471 | $168k | 8.1 mi |
| 20164 | Sterling, VA | 43,436 | $136k | 7.3 mi (near) |
| 20838 | Barnesville | 306 | $250k+ | 7.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.