Sandra H. "Sandy" Greiner (born October 26, 1945) is Iowa state senator for District 45. She was the Iowa State Representative from the 89th District, first elected in 1992. She served in the Iowa House of Representatives from 1993 until 2001, then served briefly in the Iowa Senate, until she decided to return to her House seat in 2003. She continued to serve in the House until her retirement in 2009. Greiner has served as President of the Board for the American Future Fund since July 2009.