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The Cobb Island CDP⁽¹⁾ had a population of 916 as of 2020-2024 American Community Survey 5-Year Estimates. Cobb Island ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Maryland. See peer rankings below.

The primary coordinate point for Cobb Island is located at latitude 38.2585 and longitude -76.8439 in Charles County. The formal boundaries for the Cobb Island Census Designated Place encompass a land area of 0.62 sq. miles and a water area of 0.3 sq. miles. Charles County is in the Eastern time zone (GMT -5).

The Cobb Island Census Designated Place has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Cobb Island Census Designated Place is located within District 5, Thompkinsville, a minor civil division (MCD) of Charles County.

A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

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Cobb Island Demographic Data
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Cobb Island, MD Data & Demographics

Source: 2020-2024 American Community Survey 5-Year Estimates

POPULATION
Total Population	916 (100%)
Population Density	1,464 per sq mi
Diversity Index¹	15


INCOME
Median Household Income	$0
Per Capita Income	$51,769
Median Home Value	$275,000

HOUSING
Total HU (Housing Units)	567 (100%)
Owner Occupied HU	362 (63.8%)
Renter Occupied HU	—
Vacant Housing Units	205 (36.2%)

HOUSEHOLDS
Total Households	362
Average Household Size	2.53
Family Households	282 (77.9%)

NOTES

The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).

Cobb Island, MD - Peer Comparisons by Rank and Percentile

The table below compares Cobb Island to the other 536 incorporated cities, towns and CDPs in Maryland by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description	Rank	Percentile
Total Population	# 344	36th
Population Density	# 264	51st
Median Household Income	# 536	1st
Per Capita Income	# 219	59th
Diversity Index	# 418	22nd

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.

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Cobb Island, MD Profile: Facts & Data

Cobb Island, Maryland - Basic Facts

Cobb Island, MD Data & Demographics

POPULATION

INCOME

HOUSING

HOUSEHOLDS

Cobb Island, MD - Peer Comparisons by Rank and Percentile

Cobb Island, MD - Most Popular Things to Do

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