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Iowa

The Old Northwest · in the Union from 1848 · 10 electoral votes · 612,405 souls (1860 census)

I · The presidential vote, left against right

Iowa · left-bloc share0257510018161820182418281832183618401844184818521856186018641868501848: left bloc 61.1%1852: left bloc 53.1%1856: left bloc 63.1%1860: left bloc 62.6%1864: left bloc 53.1%

The gold line is the left bloc's share of the vote — parties left of the spectrum midline against everything from the midline rightward. Hover, tap or tab a cycle for the posted board.

II · The House delegation, cycle by cycle

Iowa · House delegation02575100161820222426283032343638404244464850525456586062646668501848 delegation1850 delegation1852 delegation1854 delegation1856 delegation1858 delegation1860 delegation1862 delegation1864 delegation1866 delegation

Each line is a party's share of the delegation's seats — above the dashed rule, one party holds the house alone. Hover, tap or tab a cycle to post its full slate.

III · Party control, cycle by cycle

Iowa · party controlterritory161820222426283032343638404244464850525456586062646668Presidential voteLibPopDem1816 · President Outside the Union1818 · President Outside the Union1820 · President Outside the Union1822 · President Outside the Union1824 · President Outside the Union1826 · President Outside the Union1828 · President Outside the Union1830 · President Outside the Union1832 · President Outside the Union1834 · President Outside the Union1836 · President Outside the Union1838 · President Outside the Union1840 · President Outside the Union1842 · President Outside the Union1844 · President Outside the Union1846 · President Outside the Union1848 · President J.B. Stoner · Lib — 61.1% James A. Pearce · Nat — 38.9%1850 · President Liberal — held — no race1852 · President Samuel Houston · Lib — 53.1% James A. Pearce · Nat — 46.9%1854 · President Liberal — held — no race1856 · President John Motley Morehead · Nat — 36.9% Preston Brooks · Lib — 32.4% James A. Pearce · PopDem — 30.7%1858 · President National — held — no race1860 · President Abraham Lincoln · PopDem — 62.6% Daniel F. Webster · Nat — 36.6% Thomas F. Bowie · SN — 0.9%1862 · President Popular Democratic — held — no race1864 · President Abraham Lincoln · PopDem — 53.1% Robert E. Lee · Nat — 46.9%1866 · President Popular Democratic — held — no race1868 · President Popular Democratic — held — no raceGovernorLibPopDem1816 · Governor Outside the Union1818 · Governor Outside the Union1820 · Governor Outside the Union1822 · Governor Outside the Union1824 · Governor Outside the Union1826 · Governor Outside the Union1828 · Governor Outside the Union1830 · Governor Outside the Union1832 · Governor Outside the Union1834 · Governor Outside the Union1836 · Governor Outside the Union1838 · Governor Outside the Union1840 · Governor Outside the Union1842 · Governor Outside the Union1844 · Governor Outside the Union1846 · Governor Outside the Union1848 · Governor No race1850 · Governor Liberal · Lib — 56.0% National · Nat — 44.0%1852 · Governor Liberal — held — no race1854 · Governor Liberal · Lib — 54.5% National · Nat — 34.0% Popular Democratic · PopDem — 11.5%1856 · Governor Liberal — held — no race1858 · Governor Popular Democratic · PopDem — 72.8% National · Nat — 27.2%1860 · Governor Popular Democratic — held — no race1862 · Governor Popular Democratic · PopDem — 57.7% National · Nat — 42.3%1864 · Governor Popular Democratic — held — no race1866 · Governor National · Nat — 51.5% Popular Democratic · PopDem — 48.5%1868 · Governor National — held — no raceSenate · seat 1LibPopDem1816 · Senate seat 1 Outside the Union1818 · Senate seat 1 Outside the Union1820 · Senate seat 1 Outside the Union1822 · Senate seat 1 Outside the Union1824 · Senate seat 1 Outside the Union1826 · Senate seat 1 Outside the Union1828 · Senate seat 1 Outside the Union1830 · Senate seat 1 Outside the Union1832 · Senate seat 1 Outside the Union1834 · Senate seat 1 Outside the Union1836 · Senate seat 1 Outside the Union1838 · Senate seat 1 Outside the Union1840 · Senate seat 1 Outside the Union1842 · Senate seat 1 Outside the Union1844 · Senate seat 1 Outside the Union1846 · Senate seat 1 Outside the Union1848 · Senate seat 1 Liberal · Lib — 64.9% National · Nat — 35.1%1850 · Senate seat 1 Liberal — held — no race1852 · Senate seat 1 Liberal · Lib — 60.0% National · Nat — 32.4% Popular Democratic · PopDem — 7.5%1854 · Senate seat 1 Liberal — held — no race1856 · Senate seat 1 Popular Democratic · PopDem — 34.2% Liberal · Lib — 33.8% National · Nat — 32.0%1858 · Senate seat 1 Popular Democratic — held — no race1860 · Senate seat 1 Popular Democratic · PopDem — 75.5% National · Nat — 24.5%1862 · Senate seat 1 Popular Democratic — held — no race1864 · Senate seat 1 Popular Democratic · PopDem — 63.2% National · Nat — 36.8%1866 · Senate seat 1 Popular Democratic — held — no race1868 · Senate seat 1 Popular Democratic — held — no raceSenate · seat 2LibPopDem1816 · Senate seat 2 Outside the Union1818 · Senate seat 2 Outside the Union1820 · Senate seat 2 Outside the Union1822 · Senate seat 2 Outside the Union1824 · Senate seat 2 Outside the Union1826 · Senate seat 2 Outside the Union1828 · Senate seat 2 Outside the Union1830 · Senate seat 2 Outside the Union1832 · Senate seat 2 Outside the Union1834 · Senate seat 2 Outside the Union1836 · Senate seat 2 Outside the Union1838 · Senate seat 2 Outside the Union1840 · Senate seat 2 Outside the Union1842 · Senate seat 2 Outside the Union1844 · Senate seat 2 Outside the Union1846 · Senate seat 2 Outside the Union1848 · Senate seat 2 No race1850 · Senate seat 2 Liberal · Lib — 64.7% National · Nat — 35.3%1852 · Senate seat 2 Liberal — held — no race1854 · Senate seat 2 Liberal · Lib — 66.6% National · Nat — 31.7% Popular Democratic · PopDem — 1.7%1856 · Senate seat 2 Liberal — held — no race1858 · Senate seat 2 Popular Democratic · PopDem — 75.2% National · Nat — 24.8%1860 · Senate seat 2 Popular Democratic — held — no race1862 · Senate seat 2 Popular Democratic · PopDem — 60.9% National · Nat — 39.1%1864 · Senate seat 2 Popular Democratic — held — no race1866 · Senate seat 2 Popular Democratic · PopDem — 57.8% National · Nat — 42.2%1868 · Senate seat 2 Popular Democratic — held — no raceHouse delegationPopDem1816 · House Outside the Union1818 · House Outside the Union1820 · House Outside the Union1822 · House Outside the Union1824 · House Outside the Union1826 · House Outside the Union1828 · House Outside the Union1830 · House Outside the Union1832 · House Outside the Union1834 · House Outside the Union1836 · House Outside the Union1838 · House Outside the Union1840 · House Outside the Union1842 · House Outside the Union1844 · House Outside the Union1846 · House Outside the Union1848 · House Liberal — 1 seat · 100%1850 · House Liberal — 1 seat · 100%1852 · House National — 1 seat · 50% Liberal — 1 seat · 50%1854 · House National — 1 seat · 50% Liberal — 1 seat · 50%1856 · House Liberal — 1 seat · 50% Popular Democratic — 1 seat · 50%1858 · House Popular Democratic — 3 seats · 100%1860 · House Popular Democratic — 3 seats · 100%1862 · House Popular Democratic — 2 seats · 67% National — 1 seat · 33%1864 · House Popular Democratic — 6 seats · 75% National — 2 seats · 25%1866 · House Popular Democratic — 5 seats · 63% National — 3 seats · 38%1868 · House No raceState legislatureLibPopDem1816 · Legislature Outside the Union1818 · Legislature Outside the Union1820 · Legislature Outside the Union1822 · Legislature Outside the Union1824 · Legislature Outside the Union1826 · Legislature Outside the Union1828 · Legislature Outside the Union1830 · Legislature Outside the Union1832 · Legislature Outside the Union1834 · Legislature Outside the Union1836 · Legislature Outside the Union1838 · Legislature Outside the Union1840 · Legislature Outside the Union1842 · Legislature Outside the Union1844 · Legislature Outside the Union1846 · Legislature Outside the Union1848 · Legislature Liberal — 16 seats · 64% National — 9 seats · 36%1850 · Legislature Liberal — 16 seats · 64% National — 9 seats · 36%1852 · Legislature Liberal — 15 seats · 60% National — 8 seats · 32% Popular Democratic — 2 seats · 8%1854 · Legislature Liberal — 17 seats · 68% National — 8 seats · 32%1856 · Legislature Popular Democratic — 9 seats · 36% National — 8 seats · 32% Liberal — 8 seats · 32%1858 · Legislature Popular Democratic — 19 seats · 76% National — 6 seats · 24%1860 · Legislature Popular Democratic — 19 seats · 76% National — 6 seats · 24%1862 · Legislature Popular Democratic — 15 seats · 60% National — 10 seats · 40%1864 · Legislature Popular Democratic — 16 seats · 64% National — 9 seats · 36%1866 · Legislature Popular Democratic — 14 seats · 56% National — 11 seats · 44%1868 · Legislature No race

Pick a cycle — hover, tap, or tab to one — to post its record: winners, margins, and seats as the results were filed.

  • Popular Democratic (PopDem)
  • Liberal (Lib)
  • National (Nat)

Bars run from the election that won them to the next: an office keeps its last winner's colour until the state votes again, and the gold notches mark those elections. Mid-term party changes — collapses, secessions — left no election record and cannot be drawn.