A Mississippi River market where Iowa and Illinois suburbs split the vote
Straddling two states along the Mississippi, the Quad Cities market blends blue-collar manufacturing towns with growing suburban tracts, producing competitive margins that make it a reliable bellwether in both Iowa and Illinois contests.
| County | Pop. | Margin | Dem | Rep | Total | Share |
|---|---|---|---|---|---|---|
| Scott | 175K | R+3.9 | 42,479 | 45,976 | 90,133 | 6.1% |
| Scott | 171K | R+3.9 | 42,479 | 45,976 | 90,133 | 6.1% |
| Scott | 163K | R+3.9 | 42,479 | 45,976 | 90,133 | 6.1% |
| Scott | 159K | R+3.9 | 42,479 | 45,976 | 90,133 | 6.1% |
| Rock Island | 149K | D+9.6 | 34,126 | 28,061 | 63,458 | 4.3% |
| Rock Island | 147K | D+9.6 | 34,126 | 28,061 | 63,458 | 4.3% |
| Rock Island | 147K | D+9.6 | 34,126 | 28,061 | 63,458 | 4.3% |
| Rock Island | 143K | D+9.6 | 34,126 | 28,061 | 63,458 | 4.3% |
| Whiteside | 61K | R+14.7 | 11,012 | 14,898 | 26,447 | 1.8% |
| Whiteside | 59K | R+14.7 | 11,012 | 14,898 | 26,447 | 1.8% |
| Whiteside | 57K | R+14.7 | 11,012 | 14,898 | 26,447 | 1.8% |
| Knox | 56K | R+9.4 | 9,838 | 11,917 | 22,191 | 1.5% |
| Whiteside | 55K | R+14.7 | 11,012 | 14,898 | 26,447 | 1.8% |
| Knox | 52K | R+9.4 | 9,838 | 11,917 | 22,191 | 1.5% |
| Knox | 52K | R+9.4 | 9,838 | 11,917 | 22,191 | 1.5% |
| Henry | 51K | R+24.4 | 9,226 | 15,359 | 25,092 | 1.7% |
| Clinton | 50K | R+18.8 | 9,472 | 13,964 | 23,878 | 1.6% |
| Henry | 50K | R+24.4 | 9,226 | 15,359 | 25,092 | 1.7% |
| Henry | 50K | R+24.4 | 9,226 | 15,359 | 25,092 | 1.7% |
| Clinton | 49K | R+18.8 | 9,472 | 13,964 | 23,878 | 1.6% |
| Knox | 49K | R+9.4 | 9,838 | 11,917 | 22,191 | 1.5% |
| Henry | 49K | R+24.4 | 9,226 | 15,359 | 25,092 | 1.7% |
| Clinton | 48K | R+18.8 | 9,472 | 13,964 | 23,878 | 1.6% |
| Clinton | 46K | R+18.8 | 9,472 | 13,964 | 23,878 | 1.6% |
| Muscatine | 43K | R+14.9 | 8,212 | 11,152 | 19,752 | 1.3% |
| Muscatine | 43K | R+14.9 | 8,212 | 11,152 | 19,752 | 1.3% |
| Muscatine | 42K | R+14.9 | 8,212 | 11,152 | 19,752 | 1.3% |
| Des Moines | 42K | R+15.0 | 7,935 | 10,794 | 19,054 | 1.3% |
| Muscatine | 42K | R+14.9 | 8,212 | 11,152 | 19,752 | 1.3% |
| Des Moines | 41K | R+15.0 | 7,935 | 10,794 | 19,054 | 1.3% |
| Des Moines | 40K | R+15.0 | 7,935 | 10,794 | 19,054 | 1.3% |
| Des Moines | 38K | R+15.0 | 7,935 | 10,794 | 19,054 | 1.3% |
| Bureau | 36K | R+24.3 | 5,900 | 9,784 | 15,999 | 1.1% |
| Bureau | 35K | R+24.3 | 5,900 | 9,784 | 15,999 | 1.1% |
| Bureau | 34K | R+24.3 | 5,900 | 9,784 | 15,999 | 1.1% |
| Bureau | 33K | R+24.3 | 5,900 | 9,784 | 15,999 | 1.1% |
| Jodaviess | 22K | R+16.8 | 5,051 | 7,136 | 12,414 | 0.8% |
| Jodaviess | 22K | R+16.8 | 5,051 | 7,136 | 12,414 | 0.8% |
| Jodaviess | 22K | R+16.8 | 5,051 | 7,136 | 12,414 | 0.8% |
| Jodaviess | 22K | R+16.8 | 5,051 | 7,136 | 12,414 | 0.8% |
| Henry | 20K | R+35.9 | 2,995 | 6,439 | 9,600 | 0.6% |
| Jackson | 20K | R+32.5 | 3,567 | 7,074 | 10,801 | 0.7% |
| Henry | 20K | R+35.9 | 2,995 | 6,439 | 9,600 | 0.6% |
| Henry | 20K | R+35.9 | 2,995 | 6,439 | 9,600 | 0.6% |
| Henry | 20K | R+35.9 | 2,995 | 6,439 | 9,600 | 0.6% |
| Jackson | 20K | R+32.5 | 3,567 | 7,074 | 10,801 | 0.7% |
| Jackson | 20K | R+32.5 | 3,567 | 7,074 | 10,801 | 0.7% |
| Jackson | 19K | R+32.5 | 3,567 | 7,074 | 10,801 | 0.7% |
| Warren | 19K | R+25.1 | 2,711 | 4,579 | 7,447 | 0.5% |
| Warren | 18K | R+25.1 | 2,711 | 4,579 | 7,447 | 0.5% |
| Warren | 18K | R+25.1 | 2,711 | 4,579 | 7,447 | 0.5% |
| Mercer | 17K | R+27.1 | 2,950 | 5,215 | 8,346 | 0.6% |
| Carroll | 17K | R+31.7 | 2,600 | 5,082 | 7,840 | 0.5% |
| Warren | 16K | R+25.1 | 2,711 | 4,579 | 7,447 | 0.5% |
| Mercer | 16K | R+27.1 | 2,950 | 5,215 | 8,346 | 0.6% |
| Mercer | 16K | R+27.1 | 2,950 | 5,215 | 8,346 | 0.6% |
| Carroll | 16K | R+31.7 | 2,600 | 5,082 | 7,840 | 0.5% |
| Carroll | 16K | R+31.7 | 2,600 | 5,082 | 7,840 | 0.5% |
| Mercer | 15K | R+27.1 | 2,950 | 5,215 | 8,346 | 0.6% |
| Carroll | 15K | R+31.7 | 2,600 | 5,082 | 7,840 | 0.5% |
| Louisa | 12K | R+40.9 | 1,480 | 3,584 | 5,142 | 0.3% |
| Louisa | 12K | R+40.9 | 1,480 | 3,584 | 5,142 | 0.3% |
| Louisa | 11K | R+40.9 | 1,480 | 3,584 | 5,142 | 0.3% |
| Louisa | 11K | R+40.9 | 1,480 | 3,584 | 5,142 | 0.3% |
| Henderson | 8K | R+38.8 | 1,026 | 2,369 | 3,464 | 0.2% |
| Henderson | 8K | R+38.8 | 1,026 | 2,369 | 3,464 | 0.2% |
| Henderson | 7K | R+38.8 | 1,026 | 2,369 | 3,464 | 0.2% |
| Henderson | 6K | R+38.8 | 1,026 | 2,369 | 3,464 | 0.2% |
| Group | Local | National |
|---|---|---|
▶White (Non-Hispanic)(13) | 84.9% | 57.4% |
▶Hispanic / Latino(15) | 7.0% | 19.3% |
▶Black / African American(10) | 4.6% | 12.2% |
Multiracial / Other | 2.0% | 4.0% |
▶Asian(6) | 1.3% | 6.0% |
▶Native American / Alaska Native(4) | 0.2% | 0.9% |
▶Middle Eastern / North African(8) | 0.2% | 0.9% |
Catholic-Evangelical edge: +6.1pp (vs national 4.5pp). A moderate religious balance between Catholic and Evangelical traditions.
| Tradition | % Pop | % Adherents | US Pop | US Adherents |
|---|---|---|---|---|
| 13.7% | 34.9% | — | — | |
| 12.7% | 32.3% | — | — | |
| 9.6% | 24.4% | — | — | |
| 2.1% | 5.3% | — | — | |
| 1.1% | 2.9% | — | — | |
LDS (Mormon) | 0.7% | 1.8% | — | — |
Non-religiousPopulation | 60.6% | — | — | — |
Who lives in the Davenport-R.Island-Moline media market? 3,074,720 residents across 68 counties.
22% of adults hold a bachelor's degree — 11pp 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 |
|---|---|---|---|
| Senate vs Governor | R+9.0 | R+15.0 | 6.0pp |