County twins · 88.3% profile similarity
Mercer County, ILvs.Butler County, IA
Mercer County reports the higher polling-place density: 13.1% versus 9.9% in Butler County.
Population15,49514,268
Median household income$74,182$73,715
Bachelor's degree or higher20.9%21.4%
Poverty8.9%9.2%
Foreign-born1.1%2.3%
No vehicle2.9%3.6%
Administrative contrast
Where the election systems separate
Registered-voter turnout64.7%↔78.9%
Mail-ballot rejection rate1.49%↔0.10%
Polling places per 10,000 voters13.1%↔9.9%
Provisional-ballot acceptance rateNot reported↔14.3%
Measures come from reporting 2024 EAVS jurisdictions. Missing fields remain missing. A difference describes administration and coverage; it does not establish cause or wrongdoing.
Mail-ballot path
Mercer County
- Transmitted
- 1,490
- Returned
- 1,340
- Rejected
- 20
Mail-ballot path
Butler County
- Transmitted
- 1,016
- Returned
- 980
- Rejected
- 1