Iowa Constitution - Conventions

Iowa has held three constitutional conventions, in 1844, 1846, and 1857, all held in Iowa City, with the first proposed constitution rejected by the voters and the second and third constitutions ratified by the voters. The document proposed by the 1857 convention is the current, original Constitution of the State of Iowa.

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Iowa’s third proposed constitution was adopted in convention on March 5, 1857, and adopted by the voters on August 3, 1857, by a vote of 40,311 to 38,681. The constitution was declared by Governor James W. Grimes by proclamation issued on September 3, 1857, to be the supreme law of the State of Iowa.

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