Rock County, Minnesota Demographics 2026

Population Overview

Rock County is located in Minnesota with a total population of 9,621. It is the 70th most populous county out of 87 in Minnesota. The county encompasses 8 Census-designated places.

Age Demographics

The median age in Rock County is 41.2 years. This is 6% higher than the state median of 38.8 years.

Economy, Income & Housing

The median household income in Rock County is $71,295. This is 20% lower than the state median of $89,062. It is also 12% lower than the national median of $80,734. The poverty rate stands at 10.6%. This is 14% higher than the state poverty rate of 9.3%. The unemployment rate is 2.6%. This is 36% lower than the state rate of 4.1%. The median home value is $224,300. Housing costs are 32% lower than the state median of $329,300. The home-value-to-income ratio is 3.1x. 76.6% of occupied housing units are owner-occupied. This homeownership rate is 6% higher than the state average of 72.2%.

Race & Ethnicity

Rock County has a predominantly White (non-Hispanic) population, comprising 91.4% of all residents. Hispanic or Latino residents account for 4.0%. The Black or African American population (0.1%) is well below the state average of 7.0%. The Asian population (0.4%) is well below the state average of 5.1%.

Education

26.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% lower than the state rate of 39.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.4%.

Data Sources & Methodology

All figures for Rock County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Minnesota and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.