Rock County, Minnesota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 70th-largest in Minnesota
The population of Rock County, Minnesota is 9,628 as of the 2023 American Community Survey, making it the 70th-largest county in Minnesota. The median household income is $70,698, the median home value is $201,600, and the median age is 41.1.
The population of Rock County has declined 1.4% since 2010 (9,658 → 9,525), a -0.10% annualized rate.
9,628
Population
-0.10%
Annual growth
20
People / sq mi
$70,698
Median Income
$201,600
Median Home Value
Rock County covers 482 sq mi of land at 20.0 people per square mile.
About Rock County, MN
Rock County is a county in Minnesota with a population of 9,628. It ranks #70 among counties in Minnesota by population. The median age is 41.1, older than the national median. The population is 49.0% male and 51.0% female.
The median household income in Rock County is $70,698, below the US median of $74,580. 5.5% of residents live below the federal poverty level. Home values sit at a median of $201,600, with monthly rent averaging $745. The homeownership rate of 76.0% is higher than the national rate of 64.8%.
Educational attainment in Rock County reflects 26.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.8% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 19.9 minutes each way.
Rock County Population History (2010-2024)
The county of Rock County had a population of 9,658 in 2010 and 9,525 in 2024, a -1.4% growth over 14 years. The peak was 9,697 in 2021. Average annual growth rate: -0.09%.
9,525
Population (2024)
9,658
Population (2010)
9,697
Peak (2021)
-0.09%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 9,658 |
| 2011 | 9,601 |
| 2012 | 9,483 |
| 2013 | 9,430 |
| 2014 | 9,386 |
| 2015 | 9,456 |
| 2016 | 9,405 |
| 2017 | 9,481 |
| 2018 | 9,411 |
| 2019 | 9,334 |
| 2020 | 9,687 |
| 2021 | 9,697 |
| 2022 | 9,596 |
| 2023 | 9,601 |
| 2024 | 9,525 |
Race & Ethnicity
| White | 94.2% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
41.1
Median Age
51.0%
Female
49.0%
Male
20.1%
Age 65+
Age Distribution
Children (under 15): 19.8% · Seniors (65+): 20.1%
Income & Poverty
| Median household income | $70,698$-16,858 vs state |
| Mean household income | $91,836 |
| Per-capita income | $38,201 |
| Poverty rate | 5.5% |
| Unemployment rate | 1.8% |
| Employment-to-population | 66.4% |
Top Industries by Employment
The largest employment sector in Rock County is professional & business services, accounting for 30.6% of workers.
How residents commute
0.1%
Drive alone
2.2%
Carpool
81.1%
Public transit
9.8%
Work from home
19.9 min
Avg commute
Housing
$201,600$-103,900 vs state
Median home value
$745
Median rent
76.0%
Homeownership rate
4,236
Total housing units
93.4%
Occupied
6.6%
Vacant
24.0%
Renter-occupied
Social & access
95.1%
With health insurance
94.6%
With broadband internet
46.5%
Foreign-born
6.6%
Veterans (18+)
10.9%
With a disability
96.3%
Speak language other than English at home
Education
93.3%
High School+
26.3%
Bachelor's+
Largest cities in Minnesota
Other counties in Minnesota
Part of Minnesota
Metro areas in Minnesota
County rankings
Frequently Asked Questions
Rock County, Minnesota has a population of 9,628 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 70th-largest county in Minnesota. Population density is 20 people per square mile.
The population of Rock County has declined 1.4% since 2010 (9,658 → 9,525), a -0.10% annualized rate.
The median household income in Rock County, Minnesota is $70,698, with mean (average) household income of $91,836 and per-capita income of $38,201. 5.5% of residents live below the federal poverty level.
In Rock County, the largest racial and ethnic groups are White (94.2%), Hispanic or Latino (1.3%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Rock County, Minnesota is 41.1 years. Residents are 51.0% female and 49.0% male.
The median home value in Rock County is $201,600 and median monthly rent is $745. 76.0% of occupied housing units are owner-occupied. The county has 4,236 total housing units, 6.6% of which are vacant.
The largest employment sector in Rock County, Minnesota is professional, scientific, and management services, employing 30.6% of workers. The unemployment rate is 1.8%.
Minneapolis is among the largest cities associated with Rock County, Minnesota, with a population of 426,845.
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Statewide data for Minnesota
Population, race, income, age, and trends across Minnesota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.