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ZIP Code 20645
Cobb Island, MD, Charles County
Population
814
Land area
1.4sq mi
People per sq mi
591
City
Cobb Island
ZIP 20645 and nearby ZIP codes
ZIP 20645 at a glance
- Households here earn a median of $191,429 a year, 85% more than the Maryland figure of $103,678.
- A typical owner-occupied home is valued at $531,500 (27% above Maryland).
Local data for ZIP 20645
Counts from official public data
Housing and community stats
ZIP 20645, American Community Survey 2020-2024
Median household income
$191,429
Poverty rate
0.0%
Median home value
$531,500
Homeownership
96.3%
Bachelor's or higher
46.1%
Median age
50.9
Average commute
43.8 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
6
ZIP Business Patterns 2023
Employees
61
$3.1M annual payroll
PPP loans
$534K
17 loans
Campaign donations
$692
0% D, 36% R, 2026 cycle
Environment and hazard risk
ZIP 20645, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: heat wave
Storm events since 1996
967
Countywide, mostly thunderstorm wind
Flood insurance policies
547
0.9% of homes, county
July high / Jan low
85° / 25°F
48.1 inches of rain a year
Health statistics
Share of adults in ZIP 20645, CDC PLACES estimates
Obesity
39.2%
U.S. 33.3% +5.9 pts
Diabetes
14.0%
U.S. 12.1% +1.9 pts
Smoking
14.0%
U.S. 12.8% +1.2 pts
Uninsured (18-64)
6.7%
U.S. 11.1% -4.4 pts
Frequently asked questions
- What city is ZIP code 20645?
- ZIP code 20645 is in Cobb Island, MD (Charles County).
- What county is ZIP code 20645 in?
- ZIP code 20645 is mostly in Charles County, Maryland.
- How many people live in ZIP code 20645?
- About 814 people live in the 20645 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.