Iowa's 11th congressional district existed from 1883 to 1933, when Iowa sent eleven congressmen to the United States House of Representatives. The district covered northwestern Iowa.
The district was created in 1881 (effective 1883) from a subset of the counties in the old 9th district. From 1883 to 1886, the district included Emmet, Palo Alto, Pocahontas, Calhoun, Greene, Carroll, Sac, Buena Vista, Clay, Dickinson, Osceola, O'Brien, Cherokee, Ida, Monona, Woodbury, Plymouth, Sioux, and Lyon counties. Reapportionment in 1886 reflected the increasing population balance between eastern and western Iowa, causing the district's size to shrink and resulting in a westward shift of its eastern boundary. No new counties were added, and Emmet, Palo Alto, Pocahontas, Calhoun, Greene, and Carroll counties were moved to the 10th district. After 1886, the boundaries of the district never changed; the Iowa General Assembly refused to reapportion its districts until the loss of two seats following the 1930 census left the State with no other choice.