Every 10 years, states redraw the boundaries of their congressional districts to reflect new population counts from the census. Iowa’s new congressional map doesn’t dramatically change the state’s political landscape. Three of the state’s four districts would’ve voted for former President Donald Trump by fewer than 5 percentage points in 2020, just like under the old map.
Congressional maps in the Hawkeye State are drafted by the nonpartisan Legislative Services Agency, passed by the legislature and signed by the governor. The LSA’s first draft, which would have created a more Democratic seat in eastern Iowa, was rejected by the Republican-controlled legislature.
How the districts voted in 2020, by presidential vote margin in percentage points
Democratic
Competitive
Republican
Old map 4 districts
Change
Change in Democratic districts: 0
Change in Competitive districts: 0
Change in Republican districts: 0
New map 4 districts
How the new map shifts voting power by demographic
Iowa will continue to have four House seats. In all four, White Iowans represent the majority.
The group that represents the majority in each district
About the data
Sources: US Census Bureau, Edison Research, each state’s legislature or other redistricting authority
Methodology note: Block-level demographic data from the 2020 census is reaggregated into each new district’s boundaries.
