Duncan, South Carolina Population 2020

3,663

Duncan is a city located in South Carolina. With a 2020 population of 3,663, it is the 81st largest city in South Carolina and the 5650th largest city in the United States. Duncan is currently growing at a rate of 1.92% annually and its population has increased by 15.15% since the most recent census, which recorded a population of 3,181 in 2010. Spanning over 5 miles, Duncan has a population density of 682 people per square mile.

The average household income in Duncan is $46,650 with a poverty rate of 19.82%. The median rental costs in recent years comes to $814 per month, and the median house value is $96,200. The median age in Duncan is 30.1 years, 25.6 years for males, and 33.4 years for females. For every 100 females there are 82.9 males.

Duncan Demographics

According to the most recent ACS, the racial composition of Duncan was:

  • White: 75.35%
  • Black or African American: 15.70%
  • Two or more races: 7.85%
  • Other race: 1.10%
  • Native American: 0.00%
  • Asian: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Duncan, South Carolina is 3,663, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 3,525.The last official US Census in 2010 recorded the population at 3,181.

Duncan, South Carolina Population 2020

Population by Race

Race Population Percentage
White2,54375.35%
Black or African American53015.70%
Two or More Races2657.85%
Some Other Race371.10%

Duncan Population Pyramid 2020

Duncan Median Age

30.1


Total

25.6


Male

33.4


Female

Duncan Adults

There are 2,418 adults, (336 of whom are seniors) in Duncan.

Duncan Age Dependency

62.1

Age Dependency Ratio

16.1

Old Age Dependency Ratio

46

Child Dependency Ratio

Duncan Sex Ratio

Female

1,845

54.67%

Male

1,530

45.33%

Duncan Households and Families

Duncan Renter vs Owner Occupied by Household Type

Duncan Household Types

Type Owner Renter
Married71.7%28.3%
All45.4%54.6%
Non Family32.8%67.2%
Female30.7%69.3%
Male20.5%79.5%

45.4%

Rate of Home Ownership

Type Count Average Size Owned
All1,2362.7145.4
Married4523.3471.7
Non Family4031.4532.8
Female2643.1430.7
Male1173.6420.5

3.21

Average Family Size

2.71

Average Household Size

5.2%

Unmarried (Opposite Sex)

0%

Unmarried (Same Sex)

Duncan Education

Education Attained Count Percentage
Less Than 9th Grade944.66%
9th to 12th Grade1396.89%
High School Graduate84541.91%
Some College56327.93%
Associates Degree874.32%
Bachelors Degree20610.22%
Graduate Degree824.07%

Duncan Educational Attainment by Race

Name Total High School Bachelors
White1,4771,328165
Black27221463
Multiple Races17417460
Hispanic85725
Other Race207

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

The highest rate of bachelors degrees is among multiple races people with a rate of 34.48%.

Name Average Male Female
Overall$28,099$32,203$24,167
Less Than High School$28,237$25,833$28,878
High School Grad$31,918$40,489$23,839
Some College$24,688$25,819$22,381
Bachelors Degree$22,000$$21,500
Graduate Degree$43,958$$

$28,099

Average Earnings

$32,203

Average Male

$24,167

Average Female

Duncan Language

Duncan Language by Age

Duncan Language

95.91% of Duncan residents speak only English, while 4.09% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 3.03% of the population.

Duncan Poverty

Duncan Poverty by Race

Name Total In Poverty Poverty Rate
White2,33635815.33%
Hispanic23815665.55%
Black52415128.82%
Other352262.86%

19.82%

Overall Poverty Rate

22.32%

Male Poverty Rate

17.75%

Female Poverty Rate

Poverty in Duncan

The race most likely to be in poverty in Duncan is Hispanic, with 65.55% below the poverty level.

The race least likely to be in poverty in Duncan is White, with 15.33% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 5.49%. Among those working part-time, it was 25.98%, and for those that did not work, the poverty rate was 12.78%.

Name Poverty
Less Than High School30.04%
Some College15.69%
High School6.15%
Bachelors or Greater5.21%
Name Poverty
Male Unemployed36.36%
Female Employed14.91%
Male Employed6.93%
Female Unemployed0.00%

Duncan Income

Duncan Income by Household Type

Name Median Mean
Households$39,167$46,650
Families$46,367$51,881
Married Families$56,851-
Non Families$27,061$32,719

Duncan Marital Status

Duncan Marital Status

Marriage Rates

36.9%

Overall Marriage Rate

40.3%

Male Marriage Rate

34.1%

Female Marriage Rate

Duncan Married by Age and Sex

Duncan Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

Duncan Marital Status by Race

Duncan Veterans

203

Number of Veterans

188

Male Veterans

15

Female Veterans

War Veterans
Second Gulf War96
Korea51
Vietnam49
First Gulf War12
World War II8
Age Group Veterans
18 to 3469
75+68
35 to 5437
55 to 6429
65 to 74
Name Veterans % of Total
White18810.38%
Hispanic2121.00%
2 or More155.98%

$Duncan Veterans by Education

4.43%

Veteran Poverty Rate

21.18%

Veteran Disability Rate

Duncan Employment Status

67.7%

Labor Force Participation

61.7%

Employment Rate

8.8%

Unemployment Rate

Duncan 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

63.02%

Born in South Carolina

97.39%

Native Born

2.61%

Foreign Born

2.01%

Non Citizen

Place of Birth

97.39% of Duncan residents were born in the United States, with 63.02% having been born in South Carolina. 2.01% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Year Population Growth Annual Growth Rate
20203,663691.92%
20193,594691.96%
20183,525902.62%
20173,435692.05%
20163,366531.60%
20153,313441.35%
20143,269320.99%
20133,237280.87%
20123,209280.88%
20113,181170.54%
20103,1642940.98%
20002,8700.00%