20625 ZIP Code — Cobb Island, MD

Charles County, Maryland

ZIP code 20625 is located in Cobb Island, Maryland, within Charles County. It covers approximately 0.49 square miles and serves a population of 1,248 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 240/301.

About ZIP code 20625

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $242,900. Owner-occupancy is high at 88%, well above the national average.

Median household income is $126,657.

The dominant occupation class is management, business, and professional, with public administration as the leading industry. An above-average commute of 47 minutes suggests many residents work outside the immediate area.

College attainment at 7% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 20625 reflects a community defined by a trades-oriented workforce and high homeownership.

1,248
population
0.49
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
20625 ZIP code map
Cities in ZIP code 20625

Below are the cities the US Postal Service accepts for ZIP code 20625. Using any city not on this list may result in mail delivery delays.

City Status
Cobb Island Acceptable
Demographics updated 05/2026
Population
Total population 1,248
Population density 2,547 / sq mi
State FIPS 24
County FIPS 017
Geography
Land area 0.49 sq mi
Water area 1.32 sq mi
Latitude 38.2625
Longitude -76.8509
Timezone Eastern (ET)
Area code 240/301
Total population by age
Gender
Race & ethnicity
Economics updated 05/2026
Household income
Income range This ZIP County avg State avg
Under $50k 51.8% 20.2% 28.2%
$50k – $100k 11.3% 28.0% 28.2%
$100k – $200k 35.4% 38.4% 30.1%
Over $200k 1.4% 13.4% 13.4%

Demographics & statistics

1,248
Population
2,547
People per sq mi
46.6
Median age
$126,657
Median household income
$49,870
Per capita income
$242,900
Median home value
$0
Median monthly rent
88.1%
Home ownership
1.7%
Poverty rate
4.1%
Unemployment
572
Housing units
6.5%
Bachelor's or higher

Age distribution

Male Female
15
Under 5
15
36
10–14
38
44
15–19
45
58
20–24
60
54
25–34
56
80
35–44
82
146
45–54
151
116
55–59
119
65
60–64
68
← Male
Female →

Age summary

GroupCount%
Under 1816313.1%
18 and over1,08586.9%
65 and over00.0%
Median age46.6 years

Race & ethnicity

White 94.9%
Two or more races 3.6%
Asian 1.5%
GroupCount%
White1,18494.9%
Two or more races453.6%
Asian191.5%

Household income

Income range This ZIP County avg State avg
Under $50k 51.8% 20.2% 28.2%
$50k – $100k 11.3% 28.0% 28.2%
$100k – $200k 35.4% 38.4% 30.1%
Over $200k 1.4% 13.4% 13.4%
$15k–$25k 2.7%
$25k–$35k 3.5%
$50k–$75k 28.5%
$75k–$100k 9.4%
$100k–$150k 15.2%
$150k–$200k 30.2%
$200k+ 10.5%
Range% of households
$15k–$25k2.7%
$25k–$35k3.5%
$50k–$75k28.5%
$75k–$100k9.4%
$100k–$150k15.2%
$150k–$200k30.2%
$200k+10.5%
Median income$126,657

Housing

Home values

$200k–$300k 64.6%
$300k–$500k 27.0%
$500k–$1M 8.4%

Housing overview

MetricValue
Median home value$242,900
Median rent / month$0
Owner occupied88.1%
Renter occupied11.9%
Vacant22.7%
Single-family detached100.0%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms6.3
Avg household size (owned)2.49

Year built

Era%
2020 or later0.0%
2010–20190.0%
2000–200923.2%
1990–19995.7%
1980–19893.3%
1970–19790.0%
1960–19693.7%
1950–19594.8%
1940–19499.7%
1939 or earlier49.7%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom0.0%
2 bedrooms40.5%
3 bedrooms46.3%
4 bedrooms12.2%
5+ bedrooms1.0%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle11.7%
2 vehicles66.1%
3 or more22.2%

Heating fuel

Fuel type%
Electricity84.6%
Fuel oil5.5%
Wood3.3%
Solar6.6%

Households & families

Household typeCount%
Married-couple family42386.9%
Cohabiting couple214.3%
Male householder, no spouse265.3%
Female householder, no spouse173.5%
Households with children under 1812625.9%
Households with seniors (65+)00.0%
Average household size2.56

Marital status

StatusMaleFemale
Never married11.5%21.7%
Married76.7%72.0%
Separated0.0%0.0%
Widowed7.0%6.3%
Divorced4.8%0.0%

Education

Less than 9th grade 0.0%
Some HS, no diploma 5.1%
HS graduate 63.3%
Some college, no degree 16.8%
Associate's degree 8.3%
Bachelor's degree 0.9%
Graduate / professional 5.7%
Metric%
HS diploma or higher94.9%
Bachelor's or higher6.5%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten00.0%
Elementary school7427.3%
High school8932.8%
College / grad school10839.9%

Employment

Industry of employment

Public administration 26.9%
Construction 18.8%
Education & healthcare 13.9%
Retail trade 10.1%
Manufacturing 8.9%
Finance & real estate 7.7%
Professional & management 5.3%
Other services 4.3%
Arts, food & hospitality 4.2%

Occupation

Category%
Management, business & arts34.9%
Service24.9%
Sales & office11.5%
Natural resources & construction23.1%
Production & transportation5.5%

Employment type

Type%
Private sector56.6%
Government35.9%
Self-employed7.6%
Unpaid family workers0.0%

Commute

Method%
Drive alone71.6%
Carpool16.8%
Public transit4.6%
Walk0.0%
Work from home4.6%
Other means2.5%
Avg commute (minutes)47.0

Poverty

All people 1.7%
Under 18 years 0.0%
18 and over 1.9%
Married-couple families 0.0%
Female-led households 0.0%

Income support

Source% of households
Social Security2.9%
Retirement income16.8%
Supplemental Security0.0%
Cash public assistance0.0%
Food stamps / SNAP0.0%

Health indicators

Condition%
Obesity38.5%
High blood pressure40.2%
High cholesterol38.5%
Diabetes12.2%
Heart disease7.3%
Stroke3.6%
Asthma10.1%
Arthritis29.7%
Kidney disease3.2%
Pulmonary disease8.5%
Cancer7.4%
Behavior / access%
Smoking19.8%
Binge drinking13.5%
No physical activity26.5%
Less than 7 hrs sleep35.6%
Depression19.2%
Fair or poor health14.8%
Poor mental health14.5%
Poor physical health10.4%
No health insurance10.5%
Visited doctor (checkup)78.7%
Visited dentist61.4%
Cholesterol screening91.9%
Teeth loss13.6%

Veterans & disability

VeteransCount%
Civilian veterans545.0%
Disability%
Any disability10.9%
Under 180.0%
18–64 years12.5%
65 and over0.0%

Health insurance coverage

Type%
Private insurance90.9%
Public insurance6.6%
No insurance4.2%
Uninsured under 199.8%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,21897.6%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,22998.5%
Born in same state1,19595.8%
Born in different state97277.9%
Foreign born342.7%
Naturalized citizen191.5%
Not a US citizen00.0%

Ancestry

AncestryCount%
Italian26621.3%
French1169.3%
AncestryCount%
Arab877%
Polish252%

Technology access

Metric% of households
Computer access39.0%
Internet access96.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 20625

What city is ZIP code 20625 in?

ZIP code 20625 is primarily assigned to Cobb Island, Maryland.

What county is ZIP code 20625 in?

ZIP code 20625 falls within Charles County, Maryland.

How educated is the population of ZIP code 20625?

7% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is ZIP code 20625 mostly owner-occupied?

88% of occupied units in ZIP code 20625 are owner-occupied, well above the national average.

What is the median household income in ZIP code 20625?

The median household income in ZIP code 20625 is $126,657, above the national median of ~$75,000.

What is the population of ZIP code 20625?

ZIP code 20625 has an estimated population of 1,248 residents, with a density of 2,552 people per square mile.

What timezone is ZIP code 20625 in?

ZIP code 20625 observes the EST timezone.

Need the complete ZIP code database? Download all 42,000+ US ZIP codes — Excel, CSV, or Access. Includes lat/lng, county FIPS & timezone.
Download database →