Jackson County is on Minnesota's border withIowa. TheDes Moines River flows south-southeasterly through the central part of the county, then into Iowa. The county terrain is hilly and carved with drainages and gullies. The area is devoted to agriculture.[6] The terrain generally slopes to the south and east; its highest point is on the lower west border, at 1,545 ft (471 m) ASL.[7] The county has a total area of 719 square miles (1,860 km2), of which 703 square miles (1,820 km2) is land and 16 square miles (41 km2) (2.3%) is water.[8]
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.
As of thecensus of 2000, there were 11,268 people, 4,556 households, and 3,116 families in the county. Thepopulation density was 16.0 per square mile (6.2/km2). There were 5,092 housing units at an average density of 7.24 per square mile (2.80/km2). The racial makeup of the county was 97.07%White, 0.09%Black orAfrican American, 0.12%Native American, 1.38%Asian, 0.97% fromother races, and 0.38% from two or more races. 1.86% of the population wereHispanic orLatino of any race. 51.9% were ofGerman, 14.1%Norwegian and 5.6%American ancestry.
There were 4,556 households, out of which 29.80% had children under the age of 18 living with them, 60.00% weremarried couples living together, 5.40% had a female householder with no husband present, and 31.60% were non-families. 28.50% of all households were made up of individuals, and 13.40% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.95.
The county population contained 24.50% under the age of 18, 7.00% from 18 to 24, 25.30% from 25 to 44, 22.60% from 45 to 64, and 20.50% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 100.60 males. For every 100 females age 18 and over, there were 99.30 males.
The median income for a household in the county was $36,746, and the median income for a family was $43,426. Males had a median income of $29,123 versus $20,860 for females. Theper capita income for the county was $17,499. About 5.20% of families and 8.60% of the population were below thepoverty line, including 11.00% of those under age 18 and 8.40% of those age 65 or over.
From 1932 to 1996, Jackson County favored the Democratic nominee in all but four presidential elections, all of which were Republican landslides. Since 2000, the county has voted Republican in every election.George W. Bush won the county by somewhat modest margins in both 2000 and 2004, andJohn McCain defeatedBarack Obama by slightly over 4% in 2008. In 2012,Mitt Romney defeated Obama by over 14%. This was a portent, as in 2016,Donald Trump nearly tripled Romney's margin of victory, defeatingHillary Clinton in the county by over 38%. Trump was the first Republican to win at least 60% of the county vote sinceDwight D. Eisenhower in 1952. His margin of victory fell slightly in 2020, but he increased his vote share to nearly 68%, the best vote share for any Republican in the county sinceWarren G. Harding. Trump's vote share increased further to nearly 70% in 2024 and his margin of victory increased to 42%, the highest for a Republican presidential candidate since Harding in 1920.[19]
United States presidential election results for Jackson County, Minnesota[20]