PlainZIP

Avenue, MD · standard

ZIP Code 20609

St. Mary's County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,120
43/sq mi
$118,102
Median income
$568,400
Median home value
20.6%
Bachelor's or higher

The verdict

Avenue pairs a top-decile household income with top-decile home values, in a rural, homeowner-dominated area.

Top 10%
household income, US ZIPs
Top 10%
home value, US ZIPs
43
people per sq mi
89%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20609 against every reporting US ZIP.

ZIP code 20609 is a sparsely populated ZIP (a standard USPS delivery area) in Avenue, St. Mary's County, Maryland, home to just 1,120 residents across 25.8 square miles, a density of 43 people per square mile, in the New York time zone.

ZIP 20609 skews affluent, with a median household income of $118,102 (3% above the Maryland average), while per-capita income is $146,472. 3.4% of residents live below the poverty line, and the unemployment rate reads 5.2%. Housing costs here run $568,400 for a typical home value (27% above the state average), with rent averaging - a month; 88.9% of homes are owner-occupied.

Educational attainment sits below the national norm: 20.6% of adults hold a bachelor's degree or higher, the median age is 59.3, and the average commute is -. A geography-based comparison follows: 9 ZIP codes within about 10 miles of 20609, plus 6 more within St. Mary's County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 20609, Avenue, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

1,120

Population

25.8

Area (sq mi)

43

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 20609?

59.3

Median Age

56.4%

Male

43.6%

Female

0.0%

Foreign-Born

White 95.8%
African American 2.7%
Asian 0.8%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 0.7%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$118,102

Median Household Income

+3% vs state

$146,472

Per Capita Income

3.4%

Poverty Rate

5.2%

Unemployment Rate

How ZIP 20609 ranks nationally

Avenue, MD household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$118,102 Top 10% higher than 90% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 45.8%
Bachelor's Degree or Higher 20.6%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

370

Total Housing Units

341

Occupied Units

29

Vacant Units

2.09

Avg Household Size

Occupancy Type

Owner 88.9%
Renter 11.1%

$568,400

Median Home Value

+27% vs state

1986

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 10 business establishments in ZIP 20609, employing approximately 38 people with a combined annual payroll of $1,452,000.

10

Businesses

38

Employees

$1.5M

Annual Payroll

1

Industry Sectors

Industry Establishments % of Total
Construction 3 30.0%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 20609 vs 20606 →

ZIP 20609 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 20609 ranks #5 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 20609 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 20609 ranks #3 of 6 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
20606 Abell, MD 431 1.4 mi
20618 Bushwood, MD 607 2.0 mi
20626 Coltons Point, MD 373 3.0 mi
20624 Clements, MD 1,282 4.4 mi
20621 Chaptico, MD 1,373 4.5 mi
20625 Cobb Island, MD 1,062 5.1 mi
20650 Leonardtown, MD 13,717 6.5 mi
20660 Morganza, MD 97 7.1 mi
20659 Mechanicsville, MD 23,498 10.2 mi

More ZIP Codes in St. Mary's County

20653 standard
Lexington Park, MD
Pop: 24,481
20659 standard
Mechanicsville, MD
Pop: 23,498
20650 standard
Leonardtown, MD
Pop: 13,717
20619 standard
California, MD
Pop: 10,503
20636 standard
Hollywood, MD
Pop: 9,937
20634 standard
Great Mills, MD
Pop: 5,927

Related Areas

St. Mary's County Avenue, MD Maryland

Frequently Asked Questions

What county is ZIP code 20609 in? ▼
ZIP code 20609 (Avenue) is located in St. Mary's County, Maryland. St. Mary's County contains multiple ZIP codes, see the full list at /counties/st-marys-md.
What is the population of ZIP code 20609? ▼
ZIP code 20609 in Avenue, MD has a population of 1,120 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 20609? ▼
The median household income in ZIP 20609 is $118,102, which is 55% above the national average of $76,288.
What is the average home value in ZIP 20609? ▼
The median home value in ZIP 20609 is $568,400, which is 104% above the national average of $278,155.
What is the demographic makeup of ZIP 20609? ▼
The largest racial group in ZIP 20609 is White at 95.8%.
How many businesses are in ZIP code 20609? ▼
ZIP code 20609 has 10 business establishments employing approximately 38 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 20609? ▼
In ZIP code 20609, 45.8% of residents aged 25+ have a high school diploma or higher, and 20.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 20609? ▼
In ZIP code 20609, approximately 88.9% of occupied housing units are owner-occupied and 11.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 20609? ▼
The poverty rate in ZIP code 20609 is 3.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.