99chambers

Iowa State Senate seat · lines in effect since 2022

Iowa Senate District 1

A district of about 63,000 people, 26% Hispanic, 22% of adults with a bachelor's degree. It votes R+9.4 relative to the nation for president.

Catelin Drey (D) · since Aug 26, 2025Next election Nov 5, 2030The 2026 race →

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.

R+9.421st most
Democratic
Most DemocraticMost Republican26th seat · the majority lineDistrict 1

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

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

20222026
Iowa State SenateR+10.3D+14.9

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: Iowa Secretary of StateUpdated Nov 7, 2026, 3:01 PM 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 1.

Adults with a bachelor's degree22% 20th pct · 40th of 50 in IA

Lower than 80% of seats.

White adults without a degree49% 22nd pct · 39th of 50 in IA

Lower than 78% of seats.

Hispanic residents26% 100th pct · 1st of 50 in IA

Highest of 50 seats.

Black residents5% 76th pct · 13th of 50 in IA

Higher than 76% of seats.

Asian residents3% 61st pct · 20th of 50 in IA

Higher than 61% of seats.

People per square mile568 63rd pct · 19th of 50 in IA

Denser than 63% 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 26
30% college gradsR+14.5Not up in 2026District 15
23% Hispanic · 22% college gradsD+18.5Held DDistrict 10
IowaR+7.7Not up in 2026District 20
29% college gradsR+3.4Not up in 2026

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

Who has held it

These lines took effect in 2022.

  1. Catelin Drey (D)
    2026– · Won 2025 by 10.5, 2026 by 14.9
  2. Rocky de Witt (R)
    2023–2026 · Won 2022 by 10.3

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)