Town in Spartanburg County, South Carolina · 7.2 sq mi · 669 people per sq mi
About 4,800 people live in Duncan. The typical household earns $52,500, and the median resident is 34.4 years old.
2026 projection
From 4,044 in 2020
Poverty rate 12.43%
Men 33.5 · Women 37
1900–2026
4,802
2026 projection
18.7% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1900–2026
4,802
2026 projection
18.7% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 4,802 | +127 | 2.72% |
|---|---|---|---|
| 2025 | 4,675 | +120 | 2.63% |
| 2024 | 4,555 | +138 | 3.12% |
| 2023 | 4,417 | +157 | 3.69% |
| 2022 | 4,260 | +137 | 3.32% |
| 2021 | 4,123 | +79 | 1.95% |
| 2020 | 4,044 | +405 | 11.13% |
| 2019 | 3,639 | +76 | 2.13% |
| 2018 | 3,563 | +96 | 2.77% |
| 2017 | 3,467 | +71 | 2.09% |
Showing 10 of 28 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 43 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 8 residents
42% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 42% | 35% | 49% |
| Never married | 33% | 43% | 23% |
| Divorced | 16% | 21% | 11% |
| Widowed | 8% | 0% | 17% |
| Separated | <1% | <1% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau