Marion County Population

1800–2026

27,980

2026 projection

3.8% since 2020 (decrease)

010K20K30K40K18001850190019502000

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 Marion County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202627,980-2620.93%
202528,242-2620.92%
202428,504-400.14%
202328,544+310.11%
202228,513-3521.22%
202128,865-2230.77%
202029,088-1,4774.83%
201930,565-4241.37%
201830,989-2990.96%
201731,288-4841.52%

Showing 10 of 37 years.

Marion County Demographics

42.6median age

Median age

Female44.8 yrs
Male39.6 yrs

Adults

22,331
6,203 seniors (65+) · 28% of adults16,128 other adults

Sex

Female 53.1% · 15,226Male 46.9% · 13,438

Population by age

MaleFemale85+ years, male: 11585+ years, female: 49980–84 years, male: 23880–84 years, female: 52275–79 years, male: 54775–79 years, female: 41770–74 years, male: 65970–74 years, female: 1,00565–69 years, male: 98865–69 years, female: 1,21360–64 years, male: 86260–64 years, female: 1,14755–59 years, male: 89855–59 years, female: 94750–54 years, male: 82950–54 years, female: 91745–49 years, male: 76345–49 years, female: 91240–44 years, male: 73440–44 years, female: 83935–39 years, male: 1,13535–39 years, female: 87930–34 years, male: 54430–34 years, female: 84025–29 years, male: 91625–29 years, female: 82620–24 years, male: 93120–24 years, female: 73015–19 years, male: 77715–19 years, female: 89110–14 years, male: 82310–14 years, female: 9955–9 years, male: 9195–9 years, female: 9360–4 years, male: 7600–4 years, female: 71185+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 287 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

Marion County Income

$36,301median household income

Median household income

$36,301

Half of households earn more, half earn less

Median earnings

$35,114

Typical yearly pay for a worker 25 or older.

Poverty rate

30%

About 1 in 3 residents

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

Marion County Marital Status

29% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married29%32%27%
Never married44%50%40%
Divorced13%10%15%
Widowed9%5%13%
Separated5%4%6%

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