99chambers

U.S. House seat · lines in effect since 2022

Iowa's 4th District

A district of about 798,000 people, 27% of adults with a bachelor's degree. It votes R+30.7 relative to the nation for president.

Chris McGowan (R) · from Jan 3, 2027Next election Nov 7, 2028The 2026 race →
IA-4

Source: 2026 results: Iowa Secretary of State; boundaries: Census Bureau TIGER/LineUpdated Nov 7, 2026, 3:01 PM ET

Where it sits among all 435 seats

Every U.S. House 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+30.7374th most
Democratic
Most DemocraticMost Republican218th seat · the majority line312IA-4

Labels below the bar mark 3 other seats in Iowa.

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.

202220242026
U.S. HouseR+36.9R+34.3R+18.1

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 435 seats. Small marks are other seats in Iowa. The black marker is IA-4.

Adults with a bachelor's degree27% 22nd pct · 4th of 4 in IA

Lower than 78% of seats.

White adults without a degree62% 91st pct · 2nd of 4 in IA

Higher than 91% of seats.

Hispanic residents10% 38th pct · 1st of 4 in IA

Lower than 62% of seats.

Black residents2% 12th pct · 4th of 4 in IA

Lower than 88% of seats.

Asian residents2% 30th pct · 3rd of 4 in IA

Lower than 70% of seats.

People per square mile37 7th pct · 4th of 4 in IA

Less dense than 93% 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.

MN-7
25% college gradsR+36.3Held RMO-6
27% college gradsR+39.0Held RMI-2
23% college gradsR+30.2Held RMI-9
29% college gradsR+32.1Held R

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. Chris McGowan (R)
    2027– · Won 2026 by 18.1
  2. Randy Feenstra (R)
    2023–2027 · Won 2022 by 36.9, 2024 by 34.3

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