Demographics of Rock County, Minnesota

Rock County, Minnesota had 9,524 people on July 1, 2025, by the Census Bureau’s estimate: −161 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Rock County, in four figures

9,524
Population: July 1, 2025, Vintage 2025 estimate.; −1.7%
Change since July 2020: −161 people.; 41.2 ±1.2
Median age: ACS 2020–⁠2024.; $71,295 ±$6,478
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Rock County, Minnesota's population shrank 1.7% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Rock County, Minnesota's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Rock County, Minnesota's population shrank 1.7% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Rock County, Minnesota's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	9,685	100.0	100.0
2021	9,700	100.2	100.2
2022	9,603	99.2	100.7
2023	9,621	99.3	101.6
2024	9,563	98.7	102.5
2025	9,524	98.3	103.1

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Population of Rock County, Minnesota on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	9,685	−12	−13	0	0
2021	9,700	+15	−22	+1	+30
2022	9,603	−97	−13	+6	−93
2023	9,621	+18	−40	+7	+54
2024	9,563	−58	−33	+14	−40
2025	9,524	−39	−30	+2	−10

Age, 2020–2024

The median age is 41.2 ±1.2: for men 38.6 ±2.0 and for women 42.8 ±0.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Rock County by age, ACS 2020–2024
Age	People	Share	Minnesota	United States
Under 5	547 ±35	5.7% ±0.4	5.8% ±<0.1	5.6% ±<0.1
5 to 17	1,802 ±116	18.7% ±1.2	17.0% ±0.1	16.3% ±<0.1
18 to 24	757 ±116	7.9% ±1.2	8.8% ±0.1	9.1% ±<0.1
25 to 44	2,149 ±139	22.3% ±1.4	26.6% ±0.1	26.9% ±<0.1
45 to 64	2,400 ±141	24.9% ±1.5	24.5% ±0.1	24.8% ±<0.1
65 and over	1,966 ±162	20.4% ±1.7	17.3% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $71,295 ±$6,478, and income per person $38,826 ±$1,701, in 2024 dollars. The median is $89,062 ±$409 in Minnesota and $80,734 ±$166 in the United States.

Households by income

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Households in Rock County by income, ACS 2020–2024
Household income	Households	Share	Minnesota	United States
Under $25,000	644 ±123	16.0% ±3.0	11.7% ±0.2	14.6% ±<0.1
$25,000 to $49,999	678 ±117	16.8% ±2.8	14.9% ±0.2	16.7% ±<0.1
$50,000 to $74,999	763 ±126	18.9% ±3.1	15.6% ±0.2	15.5% ±<0.1
$75,000 to $99,999	467 ±99	11.6% ±2.4	13.2% ±0.1	12.6% ±<0.1
$100,000 to $149,999	745 ±125	18.5% ±3.0	19.6% ±0.2	17.5% ±<0.1
$150,000 to $199,999	448 ±92	11.1% ±2.3	11.2% ±0.2	9.6% ±<0.1
$200,000 or more	290 ±66	7.2% ±1.6	13.8% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Rock County by age, ACS 2020–2024
Age	Below poverty	Rate	Minnesota	United States
All ages	998 ±186	10.6% ±2.0	9.3% ±0.2	12.5% ±0.1
Under 18	257 ±78	11.0% ±3.3	10.3% ±0.3	16.1% ±0.1
18 to 59	557 ±119	12.0% ±2.5	9.1% ±0.2	11.6% ±0.1
60 and over	184 ±53	7.6% ±2.1	8.7% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Rock County, ACS 2020–2024
Measure	Rock County	Minnesota	United States
Housing units	4,256 ±49	2,545,030 ±1,535	143,775,355 ±10,234
Occupied	94.8% ±2.5	90.7% ±0.2	89.9% ±0.1
Vacant	5.2% ±2.3	9.3% ±0.2	10.1% ±0.1
Owner occupied	76.6% ±2.3	72.2% ±0.3	65.2% ±0.3
Renter occupied	23.4% ±3.0	27.8% ±0.2	34.8% ±0.1
Median home value	$224,300 ±$14,502	$329,300 ±$903	$332,700 ±$236
Median gross rent	$698 ±$61	$1,280 ±$7	$1,413 ±$2
Median year built	1960 ±3	1979 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Rock County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Minnesota	United States
Hispanic or Latino	384 ±0	4.0% ±<0.1	6.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	8,791 ±29	91.4% ±0.3	75.9% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 32	0% to 0.3%	6.9% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	43 ±15	0.4% ±0.2	5.1% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	48 ±23	0.5% ±0.2	0.7% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 14	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	1 to 17	< 0.1% to 0.2%	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	332 ±37	3.5% ±0.4	4.5% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Rock County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Minnesota	United States
Born in the state	5,237 ±290	54.4% ±3.0	67.1% ±0.2	57.3% ±<0.1
Born in another state	4,146 ±281	43.1% ±2.9	23.4% ±0.1	26.9% ±<0.1
Born a citizen outside the states	20 to 110	0.2% to 1.1%	0.9% ±<0.1	1.7% ±<0.1
Born abroad	173 ±59	1.8% ±0.6	8.7% ±0.1	14.1% ±<0.1
Naturalized citizens	28 to 98	0.3% to 1.0%	5.1% ±0.1	7.4% ±<0.1
Not citizens	50 to 170	0.5% to 1.8%	3.6% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Rock County among the counties of Minnesota

70th of 87 by population, July 2025. Every one is listed on the Minnesota page.

Counties of Minnesota near Rock County in population, July 2025
County	July 2025	Change since 2020
Cottonwood County	11,405	−1.0%
Lake County	10,746	−1.6%
Jackson County	9,857	−1.3%
Swift County	9,763	−0.4%
Stevens County	9,747	+0.8%
Rock County	9,524	−1.7%
Yellow Medicine County	9,477	−0.2%
Pipestone County	9,260	−1.7%
Marshall County	8,798	−2.5%
Clearwater County	8,647	+1.0%
Murray County	7,942	−2.9%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026