With 25,975 people, Marlboro County is a county in South Carolina. Four-year degrees are less common here than nationally, at 9% of adults. That trails the South Carolina median by roughly 51%. 28.5% of residents live below the federal poverty line. The typical home is worth $82,000, having risen by half since 2000. Median household income is $34,301, under the $82,259 national median.
At a glance
Lower income
median household income $34,301, below the US median
US median: $82,259
Older
median age 41.7
US median: 38.9
Less educated
9% hold a bachelor's degree
US average: 36%
More affordable
home values down 8%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Marlboro County
What changed most since 1990
Population29,361 → 25,975(−12%)US over the same years: +35%
White share49.0% → 38.2%(−10.8 pts)US over the same years: −17.8 pts
Median household income (2024 dollars)$43,364 → $34,301(−21%)US over the same years: +14%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)10.9%(133)
US avg: 26.4%
Gulf War (1990s)15.8%(192)
US avg: 24.3%
Vietnam era28.1%(343)
US avg: 33.1%
Korean War0.8%(10)
US avg: 4.5%
World War II1.5%(18)
US avg: 1%
Share of the 1,219 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Marlboro County, decade by decade
Marlboro County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
29,361
$43,364
$89,763
7.9%
65.5
2000
28,818
$48,452
$89,261
8.3%
68.3
2010
28,933
$39,831
$86,746
8.6%
72.2
2020
26,667
$38,213
$86,661
7.7%
73.5
2024
25,975
$34,301
$82,000
9.0%
76.7
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
How many people live in Marlboro County, South Carolina?
Marlboro County, South Carolina has about 25,975 residents according to the 2024 American Community Survey.
What is the median household income in Marlboro County, South Carolina?
The typical household in Marlboro County, South Carolina earns about $34,301 a year. Half of households make more than that, and half make less.
Is Marlboro County, South Carolina expensive?
In Marlboro County, South Carolina, the median home is worth about $82,000, and the typical rent is about $689 a month.
How educated are people in Marlboro County, South Carolina?
About 9.0% of adults age 25 and over in Marlboro County, South Carolina hold a bachelor's degree or higher.
What is the poverty rate in Marlboro County, South Carolina?
About 28.5% of people in Marlboro County, South Carolina live below the federal poverty line.
Has Marlboro County, South Carolina grown since 1990?
Yes, Marlboro County, South Carolina has shrunk since 1990. The population has lost about 3,386 residents, a change of about -12 percent over that period.
