Cobb Island, MD Profile: Facts, Map & Data


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Cobb Island, Maryland - Basic Facts

The Cobb Island Census Designated Place had a population of 1,228 as of July 1, 2017.

The primary coordinate point for Cobb Island is located at latitude 38.268 and longitude -76.8609 in Charles County. The formal boundaries for the Cobb Island Census Designated Place (see map below) 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 elevation is 0 feet.

The Cobb Island Census Designated Place (GNIS ID: 2583600) 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.

Beneath the boundary map are tables with Cobb Island population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Cobb Island Census Designated Place, MD Boundary Map

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Boundary Maps: District 5, Thompkinsville | Charles County | Maryland Counties / Independent Cities

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Cobb Island, MD Data & Demographics (As of July 1, 2017)


Total Population 1,228
Daytime Population: Workers 138
Daytime Population: Residents 806
Total Daytime Population (TDP) 944
Ratio TDP/Total Population1 0.77
Population in Households 1,228
Population in Familes 968
Population in Group Qrtrs 0
Population Density2 1,985
Diversity Index3 24


Median Household Income $66,087
Average Household Income $92,407
Per Capita Income $39,031


Total Housing Units 717 (100%)
Owner Occupied HU 428 (59.7%)
Renter Occupied HU 97 (13.5%)
Vacant Housing Units 192 (26.8%)
Median Home Value $261,806
Average Home Value $349,592


Total Households 525
Average Household Size 2.34
Family Households 335
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.72% 0.94%
Households 0.73% 0.97%
Families 0.85% 0.82%
Median Household Income   2.3%
Per Capita Income   2.93%

Cobb Island, MD - Peer Comparisons by Rank and Percentile

The table below compares Cobb Island to the other 518 incorporated cities, towns and CDPs in Maryland by rank and percentile using July 1, 2017 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 # 303 42nd
Population Density # 188 64th
Diversity Index # 364 30th
Median Household Income # 277 47th
Per Capita Income # 169 68th

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

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