Duncan is a city located in Greenville County and Spartanburg County South Carolina. Duncan has a 2024 population of 4,498. Duncan is currently growing at a rate of 2.53% annually and its population has increased by 10.95% since the most recent census, which recorded a population of 4,054 in 2020.
The average household income in Duncan is $66,920 with a poverty rate of 18.41%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Duncan is 30.3 years, 29.5 years for males, and 32.4 years for females.
According to the most recent ACS, the racial composition of Duncan was:
White
Black or African American
Two or more races
Other race
Native American
Asian
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 1,574 | 2.56 | 53.6 | 46.4 |
| Married | 550 | 3.17 | 55.1 | 44.9 |
| Non Family | 537 | 1.04 | 62.4 | 37.6 |
| Female | 348 | 3.41 | 54.6 | 45.4 |
| Male | 139 | 3.83 | 10.8 | 89.2 |
3
Average Family Size
2.56
Average Household Size
53.6%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among 2+ races people with a rate of 87.5%.
The highest rate of bachelors degrees is among black people with a rate of 49.65%.
All
Male
Female
$37,064
Average Earnings
$39,563
Average Male
$33,979
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
91.27% of Duncan residents speak only English, while 8.73% speak other languages. The non-English language spoken by the largest group is Other languages, which is spoken by 7.44% of the population.
rate
18.41%
Overall Poverty Rate
23.59%
Male Poverty Rate
13.98%
Female Poverty Rate
The race most likely to be in poverty in Duncan is Other, with 100% below the poverty level.
The race least likely to be in poverty in Duncan is Hispanic, with 0.55% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 7.8%. Among those working part-time, it was 6.06%, and for those that did not work, the poverty rate was 40.13%.
Married
Widowed
Divorced
Separated
NeverMarried
38.3%
Overall Marriage Rate
38.1%
Male Marriage Rate
38.5%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 45-54.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
4.17%
Veteran Poverty Rate
36.81%
Veteran Disability Rate
LaborForceParticipation
67.8%
Labor Force Participation
65.7%
Employment Rate
3.1%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
66.03%
Born in Duncan
91.93%
Native Born
8.07%
Foreign Born
5.85%
Non Citizen
2.22%
Naturalized
91.93% of Duncan residents were born in the United States, with 66.03% having been born in South Carolina. 5.85% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Africa.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 5,053 | 111 | 2.25% |
| 2028 | 4,942 | 111 | 2.3% |
| 2027 | 4,831 | 111 | 2.35% |
| 2026 | 4,720 | 111 | 2.41% |
| 2025 | 4,609 | 111 | 2.47% |
| 2024 | 4,498 | 111 | 2.53% |
| 2023 | 4,387 | 111 | 2.6% |
| 2022 | 4,276 | 136 | 3.29% |
| 2021 | 4,140 | 86 | 2.12% |
| 2020 | 4,054 | 415 | 11.4% |
| 2019 | 3,639 | 76 | 2.13% |
| 2018 | 3,563 | 96 | 2.77% |
| 2017 | 3,467 | 71 | 2.09% |
| 2016 | 3,396 | 53 | 1.59% |
| 2015 | 3,343 | 46 | 1.4% |
| 2014 | 3,297 | 34 | 1.04% |
| 2013 | 3,263 | 28 | 0.87% |
| 2012 | 3,235 | 28 | 0.87% |
| 2011 | 3,207 | 15 | 0.47% |
| 2010 | 3,192 | 322 | 11.22% |
| 2000 | 2,870 | 0 | 0% |