Residential delivery area · Maryland
ZIP Code 20842: Dickerson, MD
ZIP code 20842 uses the postal name Dickerson, Maryland and lies mostly in Montgomery County (77% of its land) with the rest in Frederick County (Census 2020 ZIP-county file). About 2,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $204,013 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Dickerson · its only residential ZIP
- County
- Montgomery County (77%); Frederick County (23%)
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- House district
- MD-6 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 55.7 sq mi · 43 people per sq mi
Where is ZIP code 20842?
20842 centers on 39.200°, -77.415° and covers 55.7 square miles of land plus 2.4 of water. It borders 10 ZIP codes: 20839, 20838, 20841, 20837, 21790, 20176, 21710, 20871, 21754, 21704.
The map draws ZIP code areas only. For the streets inside 20842, 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).
How does 20842 compare with the rest of Montgomery County?
| Measure | 20842 | In Montgomery County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 2,369 | 40th of 53 | 299th of 477 |
| Median household income | $204k | 7th of 41 | 13th of 293 |
| Median home value | $746k | 13th of 41 | 21st of 320 |
Its median household income is higher than in 99% of U.S. residential ZIP codes, and it is denser than 39% 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 20842?
The 2020 Census counted 2,021 people in 20842; the ACS, which samples households over 2020-2024, estimates 2,369. Between the 2010 and 2020 censuses its population grew 10.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,369±381 (90% margin)
- 2020 Census count
- 2,021+10.8% since 2010 (1,824)
- Households
- 802
- Median age
- 48.5
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 20842?
Of the 2,369 people the ACS estimates in 20842, 23.6% are under 18 and 14.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (65.5%), then Hispanic or Latino (15.6%).
- Under 1823.6%
- 18 to 6461.9%
- 65 and older14.5%
- White, not Hispanic65.5%
- Hispanic or Latino15.6%
- Black, not Hispanic10.3%
- Other or two or more6.0%
- Asian, not Hispanic2.6%
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 20842 earn?
Median household income is $204,013 (ACS 2020-2024), the 7th highest of the 41 ranked ZIP codes in Montgomery County. It rose from $130,503 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $204,013
- Income per person
- $82,106
- Below the poverty line
- 1.2%
- Unemployed (of the labor force)
- 0.5%
- Adults 25+ with a bachelor's degree
- 52.0%
- Adjusted gross income per tax return, 2022
- $177,734990 returns; wages 51% 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 20842?
FHFA's house price index for 20842, built from repeat sales and appraisals of the same homes, rose 56% from 2015 to 2025 and rose 57% from 2020 to 2025.
- Median home value (owners' estimate)
- $745,800
- Median gross rent
- $1,777
- Homes owned by their occupants
- 82.4%
- Housing units
- 855
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 20842?
61 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in administrative and support and waste management and remediation services (ZIP Code Business Patterns).
- Administrative and support and waste management and remediation services18
- Construction9
- Professional, scientific, and technical services7
- Manufacturing5
- Other services (except public administration)4
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 20842?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20839 | Beallsville | 158 | $160k | 1.5 mi |
| 20838 | Barnesville | 306 | $250k+ | 2.9 mi |
| 20841 | Boyds | 9,969 | $185k | 5.1 mi |
| 20837 | Poolesville | 6,699 | $174k | 5.8 mi |
| 21790 | Tuscarora | 170 | $78k | 6.4 mi |
| 20176 | Leesburg, VA | 51,471 | $168k | 6.5 mi |
| 21710 | Adamstown | 4,661 | $164k | 7.5 mi |
| 20871 | Clarksburg | 30,182 | $178k | 8.2 mi |
| 21754 | Ijamsville | 8,156 | $182k | 10.6 mi |
| 21704 | Frederick | 20,006 | $161k | 10.9 mi |
| 20874 | Germantown | 62,738 | $115k | 7.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.