99chambers

Louisiana House of Representatives seat · lines in effect since 2022

Louisiana House District 40

A district of about 46,000 people, 51% Black, 17% of adults with a bachelor's degree. It votes D+7.0 relative to the nation for president.

Dustin Miller (D) · since Nov 21, 2015Next election Nov 2, 2027

2023 election

Oct 14, 2023
  1. Dustin Miller (D) · won81.3%
  2. Allen Guillory (D)18.7%

Full results →

Source: Louisiana Secretary of StateUpdated Sep 30, 2026, 1:09 PM ET

Where it sits among all 103 seats

Every Louisiana House of Representatives 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+7.030th most
Democratic
Most DemocraticMost Republican52nd seat · the majority lineDistrict 40

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 election for this seat

19 races since 1968. District numbers are redrawn after each census: each group is one set of lines.

YearWinnerRunner-upWon by
Lines first used in 2022
2023Dustin Miller (D)Allen Guillory (D)62.6
Lines first used in 2012
2019Dustin Miller (D)Allen Guillory (R)40.6
2015 runoffDustin Miller (D)Donovan K. Hudson (D)12.4
2015No winner recordedDustin Miller (D)—
Lines first used in 2002
2011Ledricka Johnson Thierry (D)Joseph Pitre (D)57.2
2007Elbert Lee Guillory (D)Brian C. Thomas (D)31.9
2003Charles I. Hudson (D)Michael W. Levier (D)49.5
Lines first used in 1992
1999Charles I. Hudson (D)Michael W. Levier (D)63.7
1995Charles I. Hudson (D)Joseph A. Pitre (D)52.6
Lines first used in 1982
1991 runoffCharles I. Hudson (D)Jerry J. Domengeaux (D)0.3
1991No winner recordedJerry J. Domengeaux (D)—
1987Armand Castille (D)Salvador L. Diesi (D)12.3
1983Salvador L. Diesi (D)Fred Wyble (D)36.3
Lines first used in 1972
1979 runoffSalvador L. Diesi (D)Steven J. Dupuis (D)8.6
1979No winner recordedSalvador L. Diesi (D)—
1975 runoffSteven J. Dupuis (D)Marion O. White (D)17.0
1975No winner recordedMarion O. White (D)—
1972Steven J. Dupuis (D)David Mayne (R)71.2
Lines first used in 1962
1968Ford Stinson · Walter Bigby (D)—Unopposed

Primaries: 1971 Democratic primary runoff · 1971 Democratic primary · 1968 Democratic primary runoff · 1967 Democratic primary

Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Districts that overlap District 40

The state's districts in other chambers that share residents with this one, and the share of District 40's area in each.

U.S. House
LA-3 61%, LA-5 39%
Louisiana State Senate
SD-24 65%, SD-17 35%

Who lives here, compared

Grey bars show the spread of all 103 seats. Small marks are other seats in Louisiana. The black marker is District 40.

Adults with a bachelor's degree17% 19th pct · 84th of 103 in LA

Lower than 81% of seats.

White adults without a degree36% 38th pct · 64th of 103 in LA

Lower than 62% of seats.

Hispanic residents3% 10th pct · 93rd of 103 in LA

Lower than 90% of seats.

Black residents51% 76th pct · 25th of 103 in LA

Higher than 76% of seats.

Asian residents1% 41st pct · 61st of 103 in LA

Lower than 59% of seats.

People per square mile230 51st pct · 51st of 103 in LA

Denser than 51% 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 96
43% BlackD+13.9Not up in 2026District 72
51% BlackD+9.4Not up in 2026District 62
58% BlackD+13.2Not up in 2026District 11
60% BlackD+14.4Not 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