Sullivans Island, SC Profile: Facts & Data


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Sullivans Island, South Carolina - Basic Facts

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The Town of Sullivan's Island had a population of 1,954 as of July 1, 2022. Sullivans Island ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in South Carolina. See peer rankings below.

The primary coordinate point for Sullivans Island is located at latitude 32.7632 and longitude -79.8368 in Charleston County. The formal boundaries for the Town of Sullivan's Island encompass a land area of 2.5 sq. miles and a water area of 0.94 sq. miles. Charleston County is in the Eastern time zone (GMT -5). The elevation is 7 feet.

The Town of Sullivan's Island has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

South Carolina is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Town of Sullivan's Island is located within Mount Pleasant Division of Charleston County.

Alternate Unofficial Names for Sullivans Island: Moultrieville, Sullivan's Island.

Jump to... (On This Page!)
  1. Sullivans Island 2022 Demographic Data
  2. Growth Rates for Sullivans Island (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. South Carolina Research Tools (Easy Tools & Current Data)
  3. South Carolina Data Comparison Tool - 2022 Demographics

Sullivans Island, SC Data & Demographics (As of July 1, 2022)


Total Population 1,954 (100%)
Population in Households 1,954 (100.0%)
Population in Families 1,490 (76.3%)
Population in Group Quarters1 0
Population Density 782
Diversity Index2 16


Median Household Income $174,355
Average Household Income $250,119
% of Income for Mortgage4 61%
Per Capita Income $98,307
Wealth Index5 318


Total HU (Housing Units) 1,079 (100%)
Owner Occupied HU 670 (62.1%)
Renter Occupied HU 98 ( 9.1%)
Vacant Housing Units 311 (28.8%)
Median Home Value $2,000,001
Average Home Value $1,716,269
Housing Affordability Index3 44


Total Households 768
Average Household Size 2.54
Family Households 456
Average Family Size 3.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2020-2022 2022-2027
Population 1.47% 0.91%
Households 1.24% 0.97%
Families   0.86%
Median Household Income   1.18%
Per Capita Income   1.59%
Owner Occupied HU   1.14%

Sullivans Island, SC - Peer Comparisons by Rank and Percentile

The table below compares Sullivans Island to the other 475 incorporated cities, towns and CDPs in South Carolina by rank and percentile using July 1, 2022 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 # 193 60th
Population Density # 184 61st
Median Household Income # 3 100th
Housing Affordability Index # 54 11th
Per Capita Income # 4 99th
Diversity Index # 461 3rd

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

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