99chambers

Montana State Senate seat · lines in effect since 2024

Montana Senate District 31

A district of about 14,000 people, 57% of adults with a bachelor's degree. It votes D+21.8 relative to the nation for president.

Pat Flowers (D) · since Nov 6, 2018Next election Nov 5, 2030The 2026 race →

Where it sits among all 50 seats

Every Montana 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.

D+21.84th most
Democratic
Most DemocraticMost Republican26th seat · the majority lineDistrict 31

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.

20162018202020242026
U.S. SenateNo raceD+41.1D+33.0D+29.0No race
GovernorD+33.4No raceNo raceD+18.8No race
Montana State SenateNo raceNo raceNo raceNo raceD+38.8

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

Source: 99chambers results archive: precinct results allocated to current lines; 2026: Montana 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 Montana. The black marker is District 31.

Adults with a bachelor's degree57% 94th pct · 4th of 50 in MT

Higher than 94% of seats.

White adults without a degree34% 2nd pct · 49th of 50 in MT

Lower than 98% of seats.

Hispanic residents9% 94th pct · 4th of 50 in MT

Higher than 94% of seats.

Black residents2% 98th pct · 2nd of 50 in MT

Higher than 98% of seats.

Asian residents3% 100th pct · 1st of 50 in MT

Highest of 50 seats.

People per square mile1,005 90th pct · 6th of 50 in MT

Denser than 90% 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 50
48% college gradsD+32.7Held DDistrict 30
62% college gradsD+15.4Not up in 2026District 23
40% college gradsD+2.1Held DDistrict 48
54% college gradsD+43.0Held 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

Who has held it

These lines took effect in 2024.

  1. Kathleen Williams (D)
    2027– · Won 2026 by 38.8

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