Duncan, South Carolina Population 2021

3,776
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Duncan is a city located in Spartanburg County South Carolina. With a 2020 population of 3,776, it is the 79th largest city in South Carolina and the 5567th largest city in the United States . Duncan is currently growing at a rate of 2.03% annually and its population has increased by 18.70% since the most recent census, which recorded a population of 3,181 in 2010. Duncan reached it's highest population of in . Spanning over 5 miles, Duncan has a population density of 703 people per square mile.

The average household income in Duncan is $50,685 with a poverty rate of 17.87%. The median rental costs in recent years comes to $834 per month, and the median house value is $121,600. The median age in Duncan is 29.6 years, 30 years for males, and 28.8 years for females.

Duncan Demographics

According to the most recent ACS, the racial composition of Duncanwas:

  • White: 68.27%
  • Black or African American: 24.39%
  • Two or more races: 6.94%
  • Other race: 0.40%
  • Native American: 0.00%
  • Asian: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Duncan, South Carolina is 3,776 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 3,626.The last official US Census in 2010 recorded the population at 3,181.

Duncan, South Carolina Population 2021

Population by Race

Race Population Percentage
White2,37168.27%
Black or African American84724.39%
Two or More Races2416.94%
Some Other Race140.40%
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Duncan Population by Race

Duncan Population Pyramid $2021

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Duncan Median Age

29.6


Total

30


Male

28.8


Female

Duncan Adults

There are 2,432 adults, (353 of whom are seniors) in Duncan.

Duncan Age Dependency

67.1

Age Dependency Ratio

17

Old Age Dependency Ratio

50.1

Child Dependency Ratio

Duncan Sex Ratio

Female

2,036

58.62%

Male

1,437

41.38%

Duncan Population by Age

Duncan Renter vs Owner Occupied by Household Type

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Duncan Household Types

Type Owner Renter
Male42.7%57.3%
Female44.1%55.9%
Non Family46%54%
All58%42%
Married81%19%

58.0%

Rate of Home Ownership

Duncan Households and Families

Type Count Average Size Owned
All1,3232.658
Non Family4801.2546
Married4793.2981
Female2473.3244.1
Male1173.8442.7

3.1

Average Family Size

2.6

Average Household Size

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Duncan Households by Type

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Education Attained Count Percentage
Less Than 9th Grade924.20%
9th to 12th Grade1989.04%
High School Graduate75334.37%
Some College51223.37%
Associates Degree984.47%
Bachelors Degree42319.31%
Graduate Degree1155.25%
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Duncan Educational Attainment by Sex (over 25)

Duncan Educational Attainment by Race

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Race Total High School Bachelors
White1,3751,183217
Black530452262
2+ Races16416444
Hispanic12711427
Other Race136

The highest rate of high school graduation is among 2+ races people with a rate of 100.00%.

The highest rate of bachelors degrees is among black people with a rate of 49.43%.

Duncan Educational Attainment by Race

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Name Average Male Female
Overall$30,350$35,970$26,152
Less Than 9th Grade$32,500$38,125$28,417
High School Graduate$31,166$36,681$23,071
Some College$24,722$25,450$22,285
Bachelors Degree$31,607$$
Graduate Degree$45,833$$

$30,350

Average Earnings

$35,970

Average Male

$26,152

Average Female

Duncan Earnings by Educational Attainment

Duncan Language by Age

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Duncan Language

95.23% of Duncan residents speak only English, while 4.77% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.05% of the population.

Duncan Language

Duncan Poverty by Race

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Name Total In Poverty Poverty Rate
White2,06630514.76%
Hispanic32818255.49%
Black84112715.10%
Other13646.15%

17.87%

Overall Poverty Rate

20.79%

Male Poverty Rate

15.84%

Female Poverty Rate

Poverty in Duncan

The race most likely to be in poverty in Duncan is Hispanic, with 55.49% below the poverty level.

The race least likely to be in poverty in Duncan is White, with 14.76% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 5.02%. Among those working part-time, it was 11.38%, and for those that did not work, the poverty rate was 27.71%.

Duncan Poverty

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Name Poverty
Less Than 9th Grade36.55%
Bachelors or Greater19.14%
Some College10.49%
High School4.91%

Duncan Poverty Rate by Education

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Rate Poverty
Male Unemployed23.17%
Female Employed7.81%
Male Employed3.24%
Female Unemployed0.00%

Duncan Poverty Rate by Employment Status and Sex

Duncan Income by Household Type

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Name Median Mean
Households$45,036$50,685
Families$52,829$59,179
Married Families$56,102-
Non Families$30,625$31,918
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Income by Household Type

Duncan Marital Status

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Marriage Rates

38.5%

Overall Marriage Rate

42.4%

Male Marriage Rate

35.3%

Female Marriage Rate

Duncan Married by Age and Sex

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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 35-44.

Duncan Marital Status by Race

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Duncan Marital Status

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206

Number of Veterans

196

Male Veterans

10

Female Veterans

War Veterans
Second Gulf War88
Vietnam70
Korea23
First Gulf War11
World War II8

Duncan Veterans by War

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Age Group Veterans
18 to 3467
65 to 7453
35 to 5432
75+31
55 to 6423

Duncan Veterans by Age

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Name Veterans % of Total
White19612.18%
Hispanic2318.11%
2+ Races104.35%

Duncan Veterans by Race

Duncan Veterans by Education

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0.00%

Veteran Poverty Rate

49.03%

Veteran Disability Rate

Duncan Veterans by Education

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70.3%

Labor Force Participation

66%

Employment Rate

6.1%

Unemployment Rate

Duncan Employment by Age

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Duncan Employment by Race

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Duncan Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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64.84%

Born in Duncan

96.95%

Native Born

3.05%

Foreign Born

2.42%

Non Citizen

0.63%

Naturalized

Place of Birth

96.95% of Duncan residents were born in the United States, with 64.84% having been born in South Carolina. 2.42% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Duncan Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
20213,776752.03%
20203,701752.07%
20193,626752.11%
20183,551932.69%
20173,458702.07%
20163,388541.62%
20153,334451.37%
20143,289320.98%
20133,257270.84%
20123,230280.87%
20113,202170.53%
20103,1853151.05%
20002,8700.00%

Duncan Population by Year