Overview
995
Total Population
50.4
Median age
45.23%
Female population %
121.1:100
Gender ratio (M:F)
60-64 years
Largest age group
64.7
Total dependency ratio
White
Largest racial group
Zero
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Rock River township's population is old compared to the rest of the country:
- The median age in Rock River township is 50.4, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Rock River township's population under 18 was 19.80%, compared to the 22.51% nationwide.
- Rock River township's elderly or the senior population (over 65 age) was 21.91% as compared to 16.04% nationwide.
- Of the total population in Rock River township, 17.39% were under the age of 15, 8.44% aged 15 to 29, 52.26% aged 30 to 64, 20.00% aged 65 to 84, and 1.91% were 85 years of age and older.

Read more about Rock River Township, Michigan population by age ➔
Gender
There are 95 less females than males in Rock River township:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 45.23% females and 54.77% males in Rock River Township, Michigan.
- The Rock River Township, Michigan gender ratio is 121.1:100 i.e. 121.1 men to 100 women (1.211).
- For male population, the largest age group is 60-64 years with a population of 79.
- For the female population, the largest age group is 5-9 years with a population of 61.

Read more about Rock River Township, Michigan population by gender ➔
Race / Ethnicity
Rock River township's population is moderately diverse:
- Racial distribution of Rock River township population: 97.59% are White, 0.30% are Black or African American and 2.11% are multiracial.
- Rock River township's racial breakdown clearly shows that there is an absolute majority of White population in the township.
- By ethnicity, Zero is Hispanic or Latino (of any race), and 995 (100% of the total population) is Non-Hispanic.
- The largest racial group in Rock River township is White with a population of 971 (97.59% of the total population).

Read more about Rock River Township, Michigan population by race ➔
Year by year
Rock River township's population has already reached its peak and is showing a trend of decline:
- The peak population was 1,249 in the year 2021
- From 2000 to 2010, Rock River township's population decreased by 1 (0.08%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Rock River township's population increased by 35 (2.90%), 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, Rock River township's population was lowest in year 2019 at 1,136.

Read more about Rock River Township, Michigan 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)