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 distinguished by its share of foreign-born residents, 46.5% of the population. Rock County is a county in Minnesota with a population of 9,628.
Median household income is $70,698, below the US median of $78,538. Poverty is relatively low for US counties at 5.5%, below the national 12.4%. The typical home is valued at $201,600, with typical rent around $745.
26.3% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Remote work is below the national 14.0% at 9.8%, and the average commute runs about 20 minutes each way.
The large foreign-born share is a defining thread in Rock County, shaping language, household composition, and the labor force behind the economic figures above.
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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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.