99chambers

U.S. House seat · current lines

Missouri's 4th District

A district of about 780,000 people, 25% of adults with a bachelor's degree. It votes R+42.3 relative to the nation for president.

Mark Alford (R) · since Jan 3, 2023Next election Nov 7, 2028The 2026 race →
MO-4

Source: 2026 results: civicAPI; 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+42.3411th most
Democratic
Most DemocraticMost Republican218th seat · the majority line15236MO-478

Labels below the bar mark 7 other seats in Missouri.

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+45.0R+44.7R+25.9

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

Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated 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 Missouri. The black marker is MO-4.

Adults with a bachelor's degree25% 17th pct · 7th of 8 in MO

Lower than 83% of seats.

White adults without a degree66% 94th pct · 2nd of 8 in MO

Higher than 94% of seats.

Hispanic residents5% 15th pct · 3rd of 8 in MO

Lower than 85% of seats.

Black residents4% 31st pct · 4th of 8 in MO

Lower than 69% of seats.

Asian residents1% 10th pct · 7th of 8 in MO

Lower than 90% of seats.

People per square mile53 12th pct · 6th of 8 in MO

Less dense than 88% 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.

IL-12
24% college gradsR+43.9Held RIL-15
26% college gradsR+40.3Held RVA-9
24% college gradsR+44.0Held RMO-6
27% college gradsR+39.0Held 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

  1. Mark Alford (R)
    2023– · Won 2022 by 45.0, 2024 by 44.7, 2026 by 25.9

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