Missouri River tri-state metro where rural margins shape statewide math
Sioux City anchors a rare three-state metropolitan area, drawing its electorate from counties in Iowa, Nebraska, and South Dakota whose agricultural economies and meatpacking workforce produce distinctive voting patterns compared with each state's urban cores.
| County | Pop. | Margin | Dem | Rep | Total | Share |
|---|---|---|---|---|---|---|
| Woodbury | 106K | R+22.9 | 16,145 | 25,969 | 42,921 | 18.5% |
| Woodbury | 104K | R+22.9 | 16,145 | 25,969 | 42,921 | 18.5% |
| Woodbury | 102K | R+22.9 | 16,145 | 25,969 | 42,921 | 18.5% |
| Woodbury | 102K | R+22.9 | 16,145 | 25,969 | 42,921 | 18.5% |
| Dakota | 21K | R+29.8 | 2,109 | 3,934 | 6,120 | 2.6% |
| Dakota | 21K | R+29.8 | 2,109 | 3,934 | 6,120 | 2.6% |
| Dakota | 20K | R+29.8 | 2,109 | 3,934 | 6,120 | 2.6% |
| Dakota | 20K | R+29.8 | 2,109 | 3,934 | 6,120 | 2.6% |
| Union | 17K | R+40.7 | 2,548 | 6,160 | 8,876 | 3.8% |
| Union | 15K | R+40.7 | 2,548 | 6,160 | 8,876 | 3.8% |
| Union | 14K | R+40.7 | 2,548 | 6,160 | 8,876 | 3.8% |
| Union | 13K | R+40.7 | 2,548 | 6,160 | 8,876 | 3.8% |
| Group | Sioux City, IA-NE-SD | National |
|---|---|---|
▶White (Non-Hispanic)(13) | 75.1% | 57.4% |
▶Hispanic / Latino(14) | 15.5% | 19.3% |
▶Black / African American(8) | 2.9% | 12.2% |
▶Asian(6) | 2.6% | 6.0% |
Multiracial / Other | 2.0% | 4.0% |
▶Native American / Alaska Native(3) | 1.7% | 0.9% |
▶Middle Eastern / North African(6) | 0.6% | 0.9% |
▶Native Hawaiian / Pacific Islander(3) | 0.1% | 0.2% |
Catholic-Evangelical edge: +19.8pp (vs national 4.5pp). A strongly Catholic-leaning religious profile, which nationally correlates with Democratic-leaning urban and suburban communities.
| Tradition | % Pop | % Adherents | US Pop | US Adherents |
|---|---|---|---|---|
| 21.0% | 46.0% | — | — | |
| 10.7% | 23.4% | — | — | |
| 9.9% | 21.7% | — | — | |
| 2.8% | 6.1% | — | — | |
LDS (Mormon) | 0.8% | 1.6% | — | — |
| 0.7% | 1.6% | — | — | |
| 0.5% | 1.2% | — | — | |
Non-religiousPopulation | 54.4% | — | — | — |
Who lives in the Sioux City, IA-NE-SD metro area? 555,367 residents across 12 counties.
21% of adults hold a bachelor's degree — 12pp below the national average. Places with similar education levels vote R+15 on average nationally.
Scale, voting-age share, and this geography's footprint inside the national electorate.
Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.
Age structure, language use, and nativity signals that explain how this geography differs from state and nation.
| Offices | Margin A | Margin B | Split |
|---|---|---|---|
| President vs Senate | R+26.3 | R+34.5 | 8.1pp |