Residential delivery area · Maryland
ZIP Code 20609: Avenue, MD
ZIP code 20609 uses the postal name Avenue, Maryland and lies entirely in St. Mary's County (Census 2020 ZIP-county file). About 710 people live there (Census Bureau, ACS 2020-2024). Median household income is $118,102 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Avenue · its only residential ZIP
- County
- St. Mary's County
- Metro area
- Lexington Park, MD
- House district
- MD-5 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 10.0 sq mi · 71 people per sq mi
Where is ZIP code 20609?
20609 centers on 38.281°, -76.748° and covers 10.0 square miles of land plus 3.2 of water. It borders 6 ZIP codes: 20606, 20618, 20626, 20624, 20621, 20650.
The map draws ZIP code areas only. For the streets inside 20609, 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 20609 compare with the rest of St. Mary's County?
| Measure | 20609 | In St. Mary's County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 714 | 17th of 27 | 371st of 477 |
| Median household income | $118k | not ranked | not ranked |
| Median home value | $568k | not ranked | not ranked |
20609's income and home value are not ranked: it has fewer than 1,000 residents (714). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 48% of 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 20609?
The 2020 Census counted 1,076 people in 20609; the ACS, which samples households over 2020-2024, estimates 714. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 714±291 (90% margin)
- 2020 Census count
- 1,076
- Households
- 341
- Median age
- 59.3
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 20609?
Of the 714 people the ACS estimates in 20609, 10.4% are under 18 and 29.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.8%).
- Under 1810.4%
- 18 to 6460.6%
- 65 and older29.0%
- White, not Hispanic95.8%
- Black, not Hispanic2.7%
- Asian, not Hispanic0.8%
- Other or two or more0.7%
- Hispanic or Latino0.0%
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 20609 earn?
Median household income is $118,102 (ACS 2020-2024).
- Median household income
- $118,102±$26,956
- Income per person
- $146,472
- Below the poverty line
- 3.4%
- Unemployed (of the labor force)
- 5.2%
- Adults 25+ with a bachelor's degree
- 20.6%
- Adjusted gross income per tax return, 2022
- $88,428570 returns; wages 64% 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 20609?
- Median home value (owners' estimate)
- $568,400
- Median gross rent
- –
- Homes owned by their occupants
- 88.9%
- Housing units
- 370
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 20609?
10 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction3
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 20609?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20606 | Abell | 291 | $88k | 1.6 mi |
| 20618 | Bushwood | 1,705 | $106k | 2.8 mi |
| 20626 | Coltons Point | 284 | – | 3.2 mi |
| 20624 | Clements | 796 | $105k | 4.0 mi |
| 20621 | Chaptico | 958 | – | 4.2 mi |
| 20650 | Leonardtown | 16,094 | $143k | 6.5 mi |
| 20656 | Loveville | 87 | – | 5.4 mi (near) |
| 20625 | Cobb Island | 849 | – | 5.5 mi (near) |
| 20661 | Mount Victoria | 0 | – | 5.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.