Cobb Island, MD demographics:
population, income, and more

Total population
916
-21.2% year-over-year change
Median household income
$/yr
% year-over-year change
Housing units
567
4.0% year-over-year change

Cobb Island population

How many people live in Cobb Island

Cobb Island is home to 916 residents, according to the most recent Census data. Gender-wise, 53.8% of Cobb Island locals are male, and 46.2% are female.

Total population
916
-21.2% year-over-year change
Gender ratio
Male
53.8%
493
Female
46.2%
423
Value Percent YoY change
Male 493 53.8% -11.7%
Female 423 46.2% -30.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Cobb Island is 50, with the population distributed as follows: about 11.8% are children under 15, then 9% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.4% of the population, while another 49.4% fall into the 45 to 64 bracket. Finally, around 4.4% are 65 or older.

Median age
50
Age breakdown
Under 15
11.8%
15 to 24
9%
25 to 44
25.4%
45 to 64
49.4%
Over 65
4.4%
Value Percent YoY change
Under 15 108 11.8% -20.0%
15 to 24 82 9% -37.9%
25 to 44 233 25.4% -21.3%
45 to 64 453 49.4% -24.4%
Over 65 40 4.4% N/A
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

At the same time, 2.2% of residents are non-citizens. There’s also a share of 5.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.8%
Non-U.S.-born citizens
0%
Non-citizens
2.2%
Value Percent YoY change
U.S.-born citizens 896 97.8% -21.5%
Non-citizens 20 2.2% 0.0%
Racial breakdown
White
92%
Black or African American
0%
American Indian and Alaska Native
0%
Asian
2.2%
Native Hawaiian and other Pacific Islander
0%
Two or more races
5.8%
Other
0%
Value Percent
White 843 92%
Asian 20 2.2%
Two or more races 53 5.8%

Households in Cobb Island

A peek inside Cobb Island households

Cobb Island has 362 households, with an average of 3 members in each. Of these, 77.9% are families, while the remaining 22.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
362
-11.9% year-over-year change
Average people per household
3
Non-family households
80
Family households
282
Value Percent YoY change
Non-family households 80 22.1% 280.9%
Family households 282 77.9% -27.7%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Cobb Island

The housing landscape of Cobb Island

Cobb Island's housing consists of 567 units, with 100% being detached single-family homes ideal for those wanting space.

Housing units
567
4.0% year-over-year change
Housing types
Value Percent
1 unit, detached 567 100%
Homes built since 2020
0
% year-over-year change

The age of buildings in Cobb Island

In Cobb Island, the median construction year is 1944. About 46.6% of homes were built before the 1940s, with another 7.8% going up by 1949. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 264 46.6% -9.9%
Built between 1940 and 1949 44 7.8% -2.2%
Built between 1970 and 1979 40 7% N/A
Built between 1980 and 1989 21 3.7% 0.0%
Built between 1990 and 1999 66 11.6% 65.0%
Built between 2000 and 2009 123 21.7% 19.4%
Built between 2010 and 2019 9 1.6% 0.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Cobb Island occupancy rates

Meanwhile, 36.2% of all homes on the local market sit vacant.

Occupied housing units
362
-11.9% year-over-year change
Occupancy breakdown
Renter occupied
0
Owner occupied
362
Value Percent YoY
change
Owner occupied 362 100% 2.8%
Unoccupied housing units
36.2%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Cobb Island housing costs

Median housing costs per month
$2,078/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.

Education in Cobb Island

Cobb Island education at a glance

About 65.6% of the population in Cobb Island went to high school, while 21.8% pursued college studies. Another 4% earned an associate degree and 2.1% hold a bachelor’s. Meanwhile, 6.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
High school diploma 497 65.6% -25.4%
College diploma 165 21.8% -1.2%
Associate degree 30 4% -57.8%
Bachelor's degree 16 2.1% 14.3%
Graduate degree 50 6.6% -3.9%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Cobb Island

How much people earn in Cobb Island

The average annual household income in Cobb Island was $124,601 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -9% change from the previous year.

Average household income in Cobb Island
$124,601/year
-9.1% year-over-year change

Cobb Island income by age

In Cobb Island, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $218,750. Overall, 97.7% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $218,750 21.5%
Above poverty level
895
Below poverty level
21
Value Percent YoY
change
Above poverty level 895 97.7% -21.6%
Below poverty level 21 2.3% 0.0%

Employment in Cobb Island

Workforce and job types in Cobb Island

The job market in Cobb Island is powered by 536 working residents, spread across a range of industries and roles. 56.2% of the working population are employed in professional or administrative positions, while 43.8% are in hands-on or service-based jobs. Also, 12.9% run their own businesses, 58% are employed by private companies, and 14% work in the public sector.

Workforce demographics

Working population
536
-25.8% year-over-year change
White collar
301
Blue collar
235
Value Percent YoY change
White collar 301 56.2% -42.1%
Blue collar 235 43.8% 16.3%
Employer type
Self employees
12.9%
Private companies
58%
Governmental workers
14%
Not for profit companies
15.1%
Value Percent YoY change
Self employees 69 12.9% 6.2%
Private companies 311 58% -10.6%
Governmental workers 75 14% -69.9%
Not for profit companies 81 15.1% 35.0%

Transportation in Cobb Island

How people get around in Cobb Island

Means of transportation
Value Percent YoY change
Car 446 83.2% -27.0%
Bus or trolleybus 38 7.1% 0.0%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Cobb Island by zipcode?

Zipcode Population Number of households Median income Average income
20625 849 328 $0 $122,056

Explore more communities

FAQs about Cobb Island demographics 

What is the total population of Cobb Island?

Cobb Island has a total population of 916 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -21.2% compared to a year ago.

What is the gender ratio in Cobb Island?

The gender ratio in Cobb Island is as follows:
  • 53.8% males (493 residents)
  • 46.2% females (423 residents)

What is the median age in Cobb Island?

The median age in Cobb Island is 50.

What is the age distribution of the population in Cobb Island?

The age distribution in Cobb Island is as follows:
  • Under 15: 11.8% (108 residents)
  • Ages 15-24: 9% (82 residents)
  • Ages 25-44: 25.4% (233 residents)
  • Ages 45-64: 49.4% (453 residents)
  • Over 65: 4.4% (40 residents)

What is the racial and ethnic makeup of Cobb Island?

The racial and ethnic makeup of Cobb Island is as follows:
  • White: 92% (843 residents)
  • Black or African American: 0% (0 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 2.2% (20 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 5.8% (53 residents)
  • Other: 0% (0 residents)

What percentage of the population in Cobb Island are U.S.-born citizens?

U.S.-born citizens represent 97.8% of the population in Cobb Island.

How many housing units are there in Cobb Island?

There are 567 housing units in Cobb Island, reflecting a +4.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Cobb Island and what is the average household size?

Cobb Island has a total of 362 households, with an average of 3 people in each.

What is the job market overview for Cobb Island?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 56.2% (301 residents)
  • Blue-collar workers: 43.8% (235 residents)

Places of employment:
  • Self-employed: 12.9% (69 residents)
  • Private companies: 58% (311 residents)
  • Governmental workers: 14% (75 residents)
  • Not-for-profit companies: 15.1% (81 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025