In the 1867 Iowa State Senate elections, Iowa voters elected state senators to serve in the twelfth Iowa General Assembly. Following the expansion of the Iowa Senate from 48 to 49 seats in 1867, elections were held for 34 of the state senate's 49 seats. State senators serve four-year terms in the Iowa State Senate.

The general election took place on October 8, 1867.

Following the previous election in 1865, Republicans had control of the Iowa Senate with 42 seats to Democrats' six seats.

To claim control of the chamber from Republicans, the Democrats needed to net 19 Senate seats.

Republicans maintained control of the Iowa State Senate following the election with the balance of power shifting to Republicans holding 40 seats, Democrats having eight seats, and a lone seat for the People's Party (a net gain of 2 seats for Democrats and 1 seat for the People's Party).

Summary of Results Note: The holdover Senators not up for re-election are not listed on this table.

Senate DistrictIncumbent PartyElected Senator PartyOutcome 3rd Samuel Alphonso Moore Rep Henry Clay Traverse Rep Rep Hold 4th Nathan Udell Dem Madison Miner Walden RepRep Gain 5th Eugene Edgar Edwards Rep James D. Wright Rep Rep Hold 6th C. G. Bridges Rep Edward M. Bill Rep Rep Hold 7th L. W. Hillyer Rep Isaac W. Keller Rep Rep Hold 8th Lewis Williams Ross Rep Napoleon Bonaparte Moore Rep Rep Hold 9th Fitz Henry Warren Rep Jefferson P. Casady DemDem Gain 10th Theron Webb Woolson Rep Charles Leopold Matthies Rep Rep Hold 11th Daniel P. Stubbs Rep Theron Webb Woolson Rep Rep Hold 12th Edward Holcomb Stiles Rep Abial Richmond Pierce Rep Rep Hold 13th William Castlebury Shippen Rep Augustus Harvey Hamilton Rep Rep Hold 15th John Abbott Parvin Rep Granville Gaylord Bennett Rep Rep Hold 16th John Ferguson McJunkin Rep John Abbott Parvin Rep Rep Hold 17th Ezekiel Silas Sampson Rep John C. Johnson Rep Rep Hold 18th J. A. L. Crookham Rep John R. Needham Rep Rep Hold 19th Thomas McMillan Rep Thomas McMillan Rep Rep Hold 20th William McMarshman Rep George E. Griffith Rep Rep Hold 22nd Joseph B. Leake Rep W. W. Cones People'sPeople's Gain 24th Henry Wharton Rep William Penn Wolf Rep Rep Hold 25th Ezekiel Clark Rep Samuel Husband Fairall DemDem Gain 26th Marsena Edgar Cutts Rep Matthew Long Rep Rep Hold 29th John Hilsinger Rep Lewis Brigham Dunham DemDem Gain 31st Joseph Barris Young Rep Robert Smyth Rep Rep Hold 32nd William B. King Rep James Chapin Rep Rep Hold 33rd Henry Clay Henderson Rep Wells Sylvanus Rice Rep Rep Hold 34th Frederick M. Knoll Dem Frederick M. Knoll Dem Dem Hold 35th John M. Brayton Rep Joseph Grimes Rep Rep Hold 36th Leonard Wells Hart Rep William G. Donnan Rep Rep Hold 37th Benjamin T. Hunt Rep Homer E. Newell Rep Rep Hold 38th William Benjamin Lakin Rep William Larrabee Rep Rep Hold 39th Coker F. Clarkson Rep Marcus Tuttle Rep Rep Hold 41st Charles Paulk Dem Liberty E. Fellows Dem Dem Hold 43rd John G. Patterson Rep John G. Patterson Rep Rep Hold 44th George W. Bassett Rep Isaac J. Mitchell Rep Rep Hold 45th Addison Oliver Rep Theodore Hawley Rep Rep Hold 46thNewly created district Addison Oliver RepRep Gain

Source:

Detailed Results NOTE: The Iowa General Assembly does not provide detailed vote totals for Iowa State Senate elections in 1867.

See also Elections in Iowa

External links District boundaries were redrawn before the 1867 general election for the Iowa Senate: Iowa Senate Districts 1866-1867 map Iowa Senate Districts 1868-1869 map

References