Chaptico, MD · standard
ZIP Code 20621
St. Mary's County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,373
- 38/sq mi Moderate-density area
- $481,100
- Median home value Above-median home value
- 15.8%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Chaptico pairs upper-quartile home values, in a rural, homeowner-dominated area.
- Top 14%
- home value, US ZIPs
- 38
- people per sq mi
- 100%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20621 against every reporting US ZIP.
ZIP code 20621 is a sparsely populated ZIP (a standard USPS delivery area) in Chaptico, St. Mary's County, Maryland, home to just 1,373 residents across 36.1 square miles, a density of 38 people per square mile, in the New York time zone.
Median household income is not on file for ZIP 20621, but per-capita income is $54,408. Economic pressure is pronounced: 20.0% of residents are below the poverty line and unemployment is 14.4%. Median home value is $481,100 (8% above the average Maryland ZIP); 100.0% of occupied homes are owner-occupied.
Educational attainment sits below the national norm: 15.8% of adults hold a bachelor's degree or higher, the median age is 63, and the average commute is -. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in St. Mary's County, so 20621 can be compared with both its immediate and county-level context.
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 20621, Chaptico, 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
1,373
Population
36.1
Area (sq mi)
38
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20621?
63.0
Median Age
55.7%
Male
44.3%
Female
2.1%
Foreign-Born
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?
$54,408
Per Capita Income
20.0%
Poverty Rate
14.4%
Unemployment Rate
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
611housing units
611
Total Housing Units
534
Occupied Units
77
Vacant Units
1.79
Avg Household Size
Occupancy Type
$481,100
Median Home Value
+8% vs state ZIP avg
1975
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 14 business establishments in ZIP 20621, employing approximately 88 people with a combined annual payroll of $2,574,000.
14
Businesses
88
Employees
$2.6M
Annual Payroll
2
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 4 | 28.6% |
| Other services (except public administration) | 3 | 21.4% |
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 20621 vs 20618 →
ZIP 20621 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20659
Mechanicsville (20659)
23,498 residents
- 20664 2,987
Newburg (20664)
2,987 residents
- 20621 1,373
Chaptico (20621)
1,373 residents
- 20624 1,282
Clements (20624)
1,282 residents
- 20609 1,120
Avenue (20609)
1,120 residents
- 20625 1,062
Cobb Island (20625)
1,062 residents
- 20645 857
Issue (20645)
857 residents
- 20618 607
Bushwood (20618)
607 residents
- 20606 431
Abell (20606)
431 residents
What this shows Among its immediate neighbors, ZIP 20621 ranks #3 by population - useful context the national average alone can't give.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20618 | Bushwood, MD | 607 | 3.5 mi |
| 20624 | Clements, MD | 1,282 | 3.2 mi |
| 20609 | Avenue, MD | 1,120 | 4.5 mi |
| 20625 | Cobb Island, MD | 1,062 | 5.5 mi |
| 20660 | Morganza, MD | 97 | 5.6 mi |
| 20606 | Abell, MD | 431 | 5.9 mi |
| 20626 | Coltons Point, MD | 373 | 7.2 mi |
| 20645 | Issue, MD | 857 | 6.4 mi |
| 20664 | Newburg, MD | 2,987 | 6.9 mi |
| 20659 | Mechanicsville, MD | 23,498 | 7.1 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 20621, both outside MD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,373 here; floor ≥1,000).
More ZIP Codes in St. Mary's County
Related Areas
Frequently Asked Questions
What county is ZIP code 20621 in?
ZIP code 20621 (Chaptico) 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 20621?
ZIP code 20621 in Chaptico, MD has a population of 1,373 according to the Census Bureau ACS 2023 estimates.
What is the average home value in ZIP 20621?
The median home value in ZIP 20621 is $481,100, which is 73% above the national average of $278,155.
What is the demographic makeup of ZIP 20621?
The largest racial group in ZIP 20621 is White at 77.0%.
How many businesses are in ZIP code 20621?
ZIP code 20621 has 14 business establishments employing approximately 88 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 20621?
In ZIP code 20621, 61.5% of residents aged 25+ have a high school diploma or higher, and 15.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the poverty rate in ZIP code 20621?
The poverty rate in ZIP code 20621 is 20.0% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 20621's numbers, next.
- See how ZIP 20621 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Chaptico, MD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.