Marlboro County Population

1790–2026

25,432

2026 projection

4% since 2020 (decrease)

05K10K15K20K25K30K35K18001850190019502000

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.

Population by year

Population estimates for Marlboro County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202625,432-560.22%
202525,488-560.22%
202425,544-2010.78%
202325,745-2070.80%
202225,952-1250.48%
202126,077-4171.57%
202026,494+3371.29%
201926,157-2560.97%
201826,413-2951.10%
201726,708-3151.17%

Showing 10 of 38 years.

Marlboro County Demographics

41.7median age

Median age

Female44.8 yrs
Male40.1 yrs

Adults

20,804
4,959 seniors (65+) · 24% of adults15,845 other adults

Sex

Female 47.3% · 12,290Male 52.7% · 13,685

Population by age

MaleFemale85+ years, male: 11185+ years, female: 39180–84 years, male: 31380–84 years, female: 32275–79 years, male: 34275–79 years, female: 54070–74 years, male: 57670–74 years, female: 72265–69 years, male: 75165–69 years, female: 89160–64 years, male: 86660–64 years, female: 1,06855–59 years, male: 1,02555–59 years, female: 72650–54 years, male: 84350–54 years, female: 74245–49 years, male: 88745–49 years, female: 68840–44 years, male: 1,15040–44 years, female: 66835–39 years, male: 71235–39 years, female: 78230–34 years, male: 1,26830–34 years, female: 65425–29 years, male: 1,07125–29 years, female: 66020–24 years, male: 1,03220–24 years, female: 75215–19 years, male: 58115–19 years, female: 57610–14 years, male: 1,04510–14 years, female: 7925–9 years, male: 4615–9 years, female: 6320–4 years, male: 6510–4 years, female: 68485+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 260 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

Marlboro County Income

$34,301median household income

Median household income

$34,301

Half of households earn more, half earn less

Median earnings

$32,058

Typical yearly pay for a worker 25 or older.

Poverty rate

28.5%

About 1 in 4 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Marlboro County Marital Status

31% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married31%28%33%
Never married43%50%36%
Divorced12%11%12%
Widowed9%4%15%
Separated5%6%4%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year