Get ready-to-use data, reports, analysis, and visualizations covering the demographics of Rock County, Wisconsin based on the current United States Census Bureau's 2023 American Community Survey (ACS) 5-Year Estimates.
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Rock County, Wisconsin Demographics: Sex by Age
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the total population of Rock County, Wisconsin is 163,944. The median age of the population in Rock County, Wisconsin is 40.1. The median age for males is 38.9 years, and for females, it is 41.3 years.
The age distribution of the population in Rock County, Wisconsin is as follows:
- Under 5 years: 5.72%
- 5–17 years (children): 16.96%
- 18–24 years (young adults): 8.39%
- 25–34 years: 12.25%
- 35–54 years: 25.15%
- 55–64 years: 14.22%
- 65 years and over (seniors): 17.32%
The total dependency ratio in Rock County, Wisconsin is 66.65%. The youth dependency ratio is 37.79%, and the old-age dependency ratio is 28.86%. In demographic terms, the dependency ratio measures the size of the population typically not in the labor force (children and older adults) relative to those of working age.
Rock County, Wisconsin Demographics: Population by Race & Ethnicity
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the breakdown of the population in Rock County, Wisconsin by race and ethnicity (racial demographics) is as follows:
- White: 80.24%
- Black/African American: 4.59%
- American Indian and Alaska Native: 0.04%
- Asian: 1.14%
- Native Hawaiian or Other Pacific Islander: 0.02%
- Some other race: 0.23%
- Two or more races: 3.88%
- Hispanic or Latino: 9.86%
The diversity index score in Rock County, Wisconsin is 34.27%, suggesting a low level of diversity.
Rock County, Wisconsin Demographics: Household Income
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the median household income in Rock County, Wisconsin over the past 12 months, adjusted for 2023 inflation, was $74,390.
The distribution of household income by income bracket in Rock County, Wisconsin is as follows:
- Less than $20,000: 9.53%
- $20,000–$34,999: 10.86%
- $35,000–$49,999: 10.97%
- $50,000–$74,999: 19.05%
- $75,000–$149,999: 35.17%
- $150,000 or more: 14.42%
Rock County, Wisconsin Demographics: Educational Attainment
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the breakdown of the total population of Rock County, Wisconsin, age 25 and older, by educational level is as follows:
- Less than high school graduate: 7.39%
- High school graduate (incl. equivalency): 33.26%
- Some college or associate's degree: 33.62%
- Bachelor's Degree: 17.70%
- Graduate or professional degree: 8.04%
In Rock County, Wisconsin, 25.73% of the population has a bachelor's degree or higher, while 92.61% are high school graduates or higher.
Rock County, Wisconsin Demographics: Health Insurance Coverage Status by Sex by Age
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the uninsured rate in Rock County, Wisconsin is 5.23%.
Rates of people in Rock County, Wisconsin lacking health insurance coverage, by age group and sex are as follows:
- Under 18: 2.45% of males and 3.50% of females are uninsured
- Ages 18–34: 5.82% of males and 5.19% of females are uninsured
- Ages 35–64: 8.70% of males and 5.92% of females are uninsured
- Ages 65 and older: 0.40% of males and 2.50% of females are uninsured
Rock County, Wisconsin Demographics: Nativity and Citizenship Status in the United States
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 97.12% of people living in Rock County, Wisconsin are U.S. citizens. This includes individuals born in the United States, Puerto Rico, or U.S. Island Areas, those born abroad to American parents, and those who became citizens through naturalization. 1.93% of the population obtained U.S. citizenship through the naturalization process. In Rock County, Wisconsin, 1.93% of the population are naturalized immigrants, who obtained U.S. citizenship through the immigration and naturalization process.
Rock County, Wisconsin Demographics: Means of Transportation to Work
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the means of transportation to work for the population of Rock County, Wisconsin are distributed as follows:
- Car, truck, or van: 88.51%
- Public transportation (excluding taxicab): 0.45%
- Bicycle: 0.15%
- Walked: 1.75%
- Taxicab, motorcycle, or other means: 0.96%
- Worked from home: 8.17%
Frequently Asked Questions
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the age breakdown of the population of Rock County, Wisconsin is as follows:
- Under 5: 5.72%
- Ages 5–17: 16.96%
- Ages 18–24: 8.39%
- Ages 25–34: 12.25%
- Ages 35–54: 25.15%
- Ages 55–64: 14.22%
- 65 or older: 17.32%
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the racial demographics of the population of Rock County, Wisconsin are as follows:
- White: 80.24%
- Black/African American: 4.59%
- American Indian and Alaska Native: 0.04%
- Asian: 1.14%
- Native Hawaiian or Other Pacific Islander: 0.02%
- Some other race: 0.23%
- Two or more races: 3.88%
- Hispanic or Latino: 9.86%
* Hispanic includes respondents of any race. Other categories are non-Hispanic.
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the distribution of household income in Rock County, Wisconsin by income bracket is as follows:
- Less than $20,000: 9.53%
- $20,000–$34,999: 10.86%
- $35,000–$49,999: 10.97%
- $50,000–$74,999: 19.05%
- $75,000–$149,999: 35.17%
- $150,000 or more: 14.42%
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the median household income in Rock County, Wisconsin in the past 12 months, in 2023 inflation-adjusted dollars, was $74,390.
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 80.24% of the population in Rock County, Wisconsin identifies as White alone (not Hispanic or Latino).
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 4.59% of the population in Rock County, Wisconsin identifies as Black or African American alone (not Hispanic or Latino).
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 5.23% of the population of Rock County, Wisconsin lacks health insurance coverage.
The detailed breakdown by age and sex is as follows:
- Under 18: 2.45% of males and 3.50% of females
- Ages 18–34: 5.82% of males and 5.19% of females
- Ages 35–64: 8.70% of males and 5.92% of females
- Ages 65 and over: 0.40% of males and 2.50% of females