Iowa's 9th congressional district

Iowa’s 9th congressional district existed from 1873 to 1943. The district was configured four times, first as part of a nine-district plan, then twice in eleven-district plans, then again in a nine-district plan. In the nine-district plans, the Ninth District encompassed the northwestern corner of Iowa, but in the eleven-district plans it encompassed Council Bluffs and nine surrounding counties.

Based on the 1870 census, Iowa’s U.S. House delegation increased from six to nine members, requiring the Iowa General Assembly to reapportion the districts. Because the northwestern area of the state was relatively less populous, its congressional district (the ninth) was by far the largest, encompassing more than a quarter of the state’s 99 counties, and running from the Minnesota border on the north and the Missouri River on the west to Story County, location of the state’s geographic center. In this phase, the Ninth District included Hamilton, Story, Boone, Webster, Humboldt, Kossuth, Emmet, Palo Alto, Pocahontas, Calhoun, Greene, Carroll, Sac, Buena Vista, Clay, Dickinson, Osceola, O'Brien, Cherokee, Ida, Crawford, Monona, Woodbury, Plymouth, Sioux, and Lyon counties. It included the growing cities of Sioux City, Fort Dodge, and Ames. During this period, the district was represented by Republicans Jackson Orr of Boone County, S. Addison Oliver of Monona County, and Cyrus Carpenter of Webster County.

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