Sullivan's Island, South Carolina Population 2020

1,921

Sullivan's Island is a city located in South Carolina. With a 2020 population of 1,921, it is the 120th largest city in South Carolina and the 7749th largest city in the United States. Sullivan's Island is currently declining at a rate of 0.00% annually and its population has increased by 7.26% since the most recent census, which recorded a population of 1,791 in 2010. Sullivan's Island reached it's highest population of 1,925 in 2016. Spanning over 3 miles, Sullivan's Island has a population density of 769 people per square mile.

The average household income in Sullivan's Island is $216,733 with a poverty rate of 7.69%. The median rental costs in recent years comes to $2,293 per month, and the median house value is $1.58 Mn. The median age in Sullivan's Island is 48.1 years, 45.8 years for males, and 49.6 years for females. For every 100 females there are 101.7 males.

Sullivan's Island Demographics

According to the most recent ACS, the racial composition of Sullivan's Island was:

  • White: 97.11%
  • Asian: 1.07%
  • Two or more races: 0.93%
  • Other race: 0.61%
  • Black or African American: 0.28%
  • Native American: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Sullivan's Island, South Carolina is 1,921, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 1,921.The last official US Census in 2010 recorded the population at 1,791.

Sullivan's Island, South Carolina Population 2020

Population by Race

Race Population Percentage
White2,08697.11%
Asian231.07%
Two or More Races200.93%
Some Other Race130.61%
Black or African American60.28%

Sullivan's Island Population Pyramid 2020

Sullivan's Island Median Age

48.1


Total

45.8


Male

49.6


Female

Sullivan's Island Adults

There are 1,689 adults, (402 of whom are seniors) in Sullivan's Island.

Sullivan's Island Age Dependency

66.9

Age Dependency Ratio

31.2

Old Age Dependency Ratio

35.7

Child Dependency Ratio

Sullivan's Island Sex Ratio

Female

1,065

49.58%

Male

1,083

50.42%

Sullivan's Island Households and Families

Sullivan's Island Renter vs Owner Occupied by Household Type

Sullivan's Island Household Types

Type Owner Renter
Male100%0%
Married89.3%10.7%
All84%16%
Non Family77%23%
Female67.1%32.9%

84.0%

Rate of Home Ownership

Type Count Average Size Owned
All8002.6984
Married4963.2489.3
Non Family2041.277
Female852.8467.1
Male153.53100

3.11

Average Family Size

2.69

Average Household Size

3.5%

Unmarried (Opposite Sex)

0.8%

Unmarried (Same Sex)

Sullivan's Island Education

Education Attained Count Percentage
Less Than 9th Grade0.00%
9th to 12th Grade120.77%
High School Graduate774.95%
Some College17311.13%
Associates Degree523.34%
Bachelors Degree65241.93%
Graduate Degree58937.88%

Sullivan's Island Educational Attainment by Race

Name Total High School Bachelors
White1,4901,4781,183
Hispanic343427
Multiple Races131313
Asian121212
Black666
Other Race44

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among black people with a rate of 100.00%.

Name Average Male Female
Overall$62,750$103,947$38,913
Less Than High School$53,500$$
High School Grad$$$
Some College$40,625$56,250$
Bachelors Degree$60,313$80,781$35,625
Graduate Degree$96,875$158,750$42,917

$62,750

Average Earnings

$103,947

Average Male

$38,913

Average Female

Sullivan's Island Language

Sullivan's Island Language by Age

Sullivan's Island Language

96.76% of Sullivan's Island residents speak only English, while 3.24% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.52% of the population.

Sullivan's Island Poverty

Sullivan's Island Poverty by Race

7.69%

Overall Poverty Rate

7.53%

Male Poverty Rate

7.84%

Female Poverty Rate

Poverty in Sullivan's Island

The race most likely to be in poverty in Sullivan's Island is White, with 8.06% below the poverty level.

The race least likely to be in poverty in Sullivan's Island is White, with 8.06% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.94%. Among those working part-time, it was 4.29%, and for those that did not work, the poverty rate was 15.02%.

Name Poverty
Some College7.11%
Bachelors or Greater6.53%
High School0.00%
Less Than High School0.00%
Name Poverty
Male Unemployed17.39%
Female Employed3.72%
Male Employed2.81%
Female Unemployed0.00%

Sullivan's Island Income

Sullivan's Island Income by Household Type

Name Median Mean
Households$135,577$216,733
Families$170,833$250,442
Married Families$193,125-
Non Families$55,833$113,498

Sullivan's Island Marital Status

Sullivan's Island Marital Status

Marriage Rates

57.6%

Overall Marriage Rate

59.9%

Male Marriage Rate

55.4%

Female Marriage Rate

Sullivan's Island Married by Age and Sex

Sullivan's Island Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Sullivan's Island Marital Status by Race

Sullivan's Island Veterans

120

Number of Veterans

117

Male Veterans

3

Female Veterans

War Veterans
Vietnam62
First Gulf War21
Second Gulf War14
World War II6
Korea3

$Sullivan's Island Veterans by Education

5.00%

Veteran Poverty Rate

15.00%

Veteran Disability Rate

Sullivan's Island Employment Status

61.2%

Labor Force Participation

59%

Employment Rate

3.5%

Unemployment Rate

Sullivan's Island Place of Birth

Origin of Non-Citizens

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

41.01%

Born in South Carolina

95.16%

Native Born

4.84%

Foreign Born

2.14%

Non Citizen

Place of Birth

95.16% of Sullivan's Island residents were born in the United States, with 41.01% having been born in South Carolina. 2.14% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Year Population Growth Annual Growth Rate
20201,9210.00%
20191,9210.00%
20181,921-4-0.21%
20171,9250.00%
20161,925201.05%
20151,905231.22%
20141,882201.07%
20131,862261.42%
20121,836170.93%
20111,819261.45%
20101,7930.00%