Overview
66,380
Total Population
39.2
Median age
49.34%
Female population %
102.7:100
Gender ratio (M:F)
20-24 years
Largest age group
52.0
Total dependency ratio
White
Largest racial group
1,087
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Marquette County's population is old compared to the rest of the country:
- The median age in Marquette County is 39.2, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Marquette County's population under 18 was 18.03%, compared to the 22.51% nationwide.
- Marquette County's elderly or the senior population (over 65 age) was 19.22% as compared to 16.04% nationwide.
- Of the total population in Marquette County, 14.97% were under the age of 15, 24.32% aged 15 to 29, 41.48% aged 30 to 64, 17.02% aged 65 to 84, and 2.20% were 85 years of age and older.

Read more about Marquette County, MI population by age ➔
Gender
There are 882 less females than males in Marquette County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.34% females and 50.66% males in Marquette County, MI.
- The Marquette County, MI gender ratio is 102.7:100 i.e. 102.7 men to 100 women (1.027).
- For male population, the largest age group is 20-24 years with a population of 3,569.
- For the female population, the largest age group is 20-24 years with a population of 3,698.

Read more about Marquette County, MI population by gender ➔
Race / Ethnicity
Marquette County's population has become increasingly diverse:
- Racial distribution of Marquette County population: 92.29% are White, 1.65% are Black or African American, 1.14% are American Indian and Alaska Native, 0.72% are Asian, 0.03% are Native Hawaiian and other Pacific Islander, 0.19% are some other race and 3.99% are multiracial.
- Marquette County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 1,087 is Hispanic or Latino (of any race), and 65,293 (98.36% of the total population) is Non-Hispanic.
- The largest racial group in Marquette County is White with a population of 61,26 (92.29% of the total population).

Read more about Marquette County, MI population by race ➔
Year by year
Marquette County's population has already reached its peak and is showing a trend of decline:
- The peak population was 67,840 in the year 2012
- From 2000 to 2010, Marquette County's population increased by 2,496 (3.86%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Marquette County's population decreased by 1,068 (1.59%), 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, Marquette County's population was lowest in year 2000 at 64,584.

Read more about Marquette County, MI 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)