Overview
33,381
Total Population
39.6
Median age
49.58%
Female population %
101.7:100
Gender ratio (M:F)
10-14 years
Largest age group
58.6
Total dependency ratio
White
Largest racial group
714
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Marion County's population is old compared to the rest of the country:
- The median age in Marion County is 39.6, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Marion County's population under 18 was 23.45%, compared to the 22.51% nationwide.
- Marion County's elderly or the senior population (over 65 age) was 17.79% as compared to 16.04% nationwide.
- Of the total population in Marion County, 19.15% were under the age of 15, 19.89% aged 15 to 29, 43.17% aged 30 to 64, 15.04% aged 65 to 84, and 2.76% were 85 years of age and older.
Read more about Marion County, IA population by age ➔
Gender
There are 283 less females than males in Marion County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.58% females and 50.42% males in Marion County, IA.
- The Marion County, IA gender ratio is 101.7:100 i.e. 101.7 men to 100 women (1.017).
- For male population, the largest age group is 15-19 years with a population of 1,363.
- For the female population, the largest age group is 10-14 years with a population of 1,299.
Read more about Marion County, IA population by gender ➔
Race / Ethnicity
Marion County's population has become increasingly diverse:
- Racial distribution of Marion County population: 94.83% are White, 0.97% are Black or African American, 0.08% are American Indian and Alaska Native, 1.20% are Asian, 0.03% are Native Hawaiian and other Pacific Islander, 0.87% are some other race and 2.03% are multiracial.
- Marion County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 714 is Hispanic or Latino (of any race), and 32,667 (97.86% of the total population) is Non-Hispanic.
- The largest racial group in Marion County is White with a population of 31,655 (94.83% of the total population).
Read more about Marion County, IA population by race ➔
Year by year
Marion County's population has not reached its peak yet and is showing a trend of further growth:
- The peak population was 33,642 in the year 2022
- From 2000 to 2010, Marion County's population increased by 1,133 (3.53%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Marion County's population increased by 183 (0.55%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Marion County's population was lowest in year 2000 at 32,092.
Read more about Marion County, IA population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)