Sullivans Island, SC Profile: Facts & Data

The Town of Sullivan's Island had a population of 1,961 as of July 1, 2024. 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 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.

Sullivans Island, SC Data & Demographics (As of July 1, 2024)

POPULATION
Total Population	1,961 (100%)
Population in Households	1,961 (100.0%)
Population in Families	1,624 (82.8%)
Population in Group Quarters¹	0
Population Density	785
Diversity Index²	16


INCOME
Median Household Income	$185,696
Average Household Income	$256,843
% of Income for Mortgage⁴	60%
Per Capita Income	$101,113
Wealth Index⁵	290
Socioeconomic Status Index⁶	High (73.6)

HOUSING
Total HU (Housing Units)	1,076 (100%)
Owner Occupied HU	685 (63.7%)
Renter Occupied HU	87 ( 8.1%)
Vacant Housing Units	304 (28.3%)
Median Home Value	$1,766,484
Average Home Value	$1,658,102
Housing Affordability Index³	44

HOUSEHOLDS
Total Households	772
Average Household Size	2.54
Family Households	575
Average Family Size	3.00

NOTES

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.
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.
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.
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).
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.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

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, 2024 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.

GROWTH RATE / YEAR	2020-2024	2024-2029
Population	0.86%	0.46%
Households	0.78%	0.72%
Families		0.69%
Median Household Income		1.50%
Per Capita Income		2.60%
Owner Occupied HU		0.95%

Variable Description	Rank	Percentile
Total Population	# 195	59th
Population Density	# 184	61st
Median Household Income	# 3	100th
Housing Affordability Index	# 53	11th
Per Capita Income	# 5	99th
Diversity Index	# 460	3rd

Sullivans Island, SC Profile: Facts & Data

Sullivans Island, South Carolina - Basic Facts

Sullivans Island, SC Data & Demographics (As of July 1, 2024)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Sullivans Island, SC - Peer Comparisons by Rank and Percentile

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