Cobb Island, MD · standard
ZIP Code 20625
Charles County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,062
- 830/sq mi
- $245,300
- Median home value
- 2.4%
- Bachelor's or higher
The verdict
Cobb Island pairs above-median home values, in a low-density, homeowner-dominated area.
- Top 44%
- home value, US ZIPs
- 830
- people per sq mi
- 100%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20625 against every reporting US ZIP.
ZIP code 20625 is a sparsely populated ZIP (a standard USPS delivery area) in Cobb Island, Charles County, Maryland, home to just 1,062 residents across 1.3 square miles, a density of 830 people per square mile, in the New York time zone.
Median household income is not on file for ZIP 20625, but per-capita income is $49,865. The poverty rate stands at 2.5% and the unemployment rate at 0.0%. The typical home here is valued at $245,300 (45% below the state average); renters pay a median of - monthly, and 100.0% of units are owner-occupied.
Formal educational attainment runs low here: just 2.4% of adults hold a bachelor's degree or higher, the median age is 45.8, and the average commute is -. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Charles County, so you can benchmark 20625 against its immediate geography rather than a 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 20625, Cobb Island, 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
1,062
Population
1.3
Area (sq mi)
830
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20625?
45.8
Median Age
54.3%
Male
45.7%
Female
2.4%
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?
$49,865
Per Capita Income
2.5%
Poverty Rate
0.0%
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?
515
Total Housing Units
328
Occupied Units
187
Vacant Units
2.59
Avg Household Size
Occupancy Type
$245,300
Median Home Value
-45% vs state
1938
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+14.0%
YoY Change (2024)
241
HPI Index (2000 = 100)
+141%
Total Change Since 2000
Home values in ZIP 20625 have increased 14.0% over the past year (2024). Since 2000, this ZIP has seen +141% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2018 | +10.0% | 201 |
| 2019 | +6.6% | 214 |
| 2020 | -8.4% | 196 |
| 2021 | +14.0% | 224 |
| 2024 | – | 241 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 11 business establishments in ZIP 20625, employing approximately 75 people with a combined annual payroll of $2,481,000.
11
Businesses
75
Employees
$2.5M
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Accommodation and food services | 6 | 54.5% |
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 20625 vs 20618 →
ZIP 20625 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 22443
Colonial Beach (22443)
8,083 residents
- 22520
Montross (22520)
5,402 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
What this shows Among its immediate neighbors, ZIP 20625 ranks #7 by population - useful context the national average alone can't give.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20618 | Bushwood, MD | 607 | 3.4 mi |
| 20645 | Issue, MD | 857 | 3.9 mi |
| 20609 | Avenue, MD | 1,120 | 5.1 mi |
| 20606 | Abell, MD | 431 | 6.0 mi |
| 20626 | Coltons Point, MD | 373 | 5.2 mi |
| 20621 | Chaptico, MD | 1,373 | 5.5 mi |
| 20664 | Newburg, MD | 2,987 | 7.4 mi |
| 20624 | Clements, MD | 1,282 | 7.9 mi |
| 22520 | Montross, VA | 5,402 | 10.3 mi |
| 22443 | Colonial Beach, VA | 8,083 | 9.9 mi |
More ZIP Codes in Charles County
Related Areas
Frequently Asked Questions
What county is ZIP code 20625 in? ▼
What is the population of ZIP code 20625? ▼
What is the average home value in ZIP 20625? ▼
What is the demographic makeup of ZIP 20625? ▼
How many businesses are in ZIP code 20625? ▼
How have home values changed in ZIP code 20625? ▼
What is the education level in ZIP code 20625? ▼
What is the poverty rate in ZIP code 20625? ▼
Read our methodology to see how this data is sourced, computed, and verified.