Iowa State Senate seat · lines in effect since 2022
Iowa Senate District 40
A district of about 63,000 people, 34% of adults with a bachelor's degree. It votes D+13.7 relative to the nation for president.
Where it sits among all 50 seats
Every Iowa State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who lives here, compared
Grey bars show the spread of all 50 seats. Small marks are other seats in Iowa. The black marker is District 40.
Higher than 71% of seats.
Lower than 69% of seats.
Lower than 51% of seats.
Higher than 86% of seats.
Higher than 78% of seats.
Denser than 92% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 3739% college gradsD+12.1Held DDistrict 36
36% college gradsD+4.7Not up in 2026District 39
30% college gradsD+24.6Held DDistrict 49
26% college gradsD+11.2Held D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET