The 2012 Iowa State Senate elections took place as part of the biennial 2012 United States elections. Iowa voters elected state senators in 26 of the state senate's 50 districts—the 25 even-numbered state senate districts and the 49th district. State senators serve four-year terms in the Iowa State Senate, with half of the seats up for election each cycle. This was the first election cycle following the 2010 census and 2011 redistricting process.