Town in Marlboro County, South Carolina · 0.7 sq mi · 161 people per sq mi
105 people live in Blenheim. The typical household earns $49,167, and the median resident is 40.9 years old.
2026 projection
From 115 in 2020
Poverty rate 21.52%
Men 45.3 · Women 40.6
2010–2026
105
2026 projection
8.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2010–2026
105
2026 projection
8.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 105 | -2 | 1.87% |
|---|---|---|---|
| 2025 | 107 | -1 | 0.93% |
| 2024 | 108 | -1 | 0.92% |
| 2023 | 109 | -1 | 0.91% |
| 2022 | 110 | -2 | 1.79% |
| 2021 | 112 | -3 | 2.61% |
| 2020 | 115 | -3 | 2.54% |
| 2019 | 118 | -4 | 3.28% |
| 2018 | 122 | -4 | 3.17% |
| 2017 | 126 | -3 | 2.33% |
Showing 10 of 17 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Blenheim has a population change lower than Marlboro County, South Carolina, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 0.82 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 5 residents
43% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 43% | 46% | 42% |
| Never married | 39% | 42% | 37% |
| Divorced | 10% | 12% | 7% |
| Widowed | 8% | 0% | 15% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources