99chambers

Louisiana State Senate seat · lines in effect since 2022

Louisiana Senate District 3

A district of about 123,000 people, 55% Black, 30% of adults with a bachelor's degree. It votes D+54.7 relative to the nation for president.

Sidney Barthelemy (D) · since Mar 14, 2026Next election Nov 2, 2027

2026 runoff

Mar 14, 2026
  1. Sidney Barthelemy (D) · won63.8%
  2. Kenn Barnes (D)36.2%

Full results →

Source: State and county election authorities (CA, DE, FL, GA, LA, MA, MN, SC, WA)Updated Oct 13, 2026, 8:26 AM ET

Where it sits among all 38 seats

Every Louisiana 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+54.74th most
Democratic
Most DemocraticMost Republican20th seat · the majority lineDistrict 3

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

18 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
2026 runoffSidney Barthelemy (D)Kenn Barnes (D)27.6
Lines first used in 2012
2019 runoffJoseph Bouie Jr. (D)John H. Bagneris (D)19.3
2019No winner recordedJoseph Bouie Jr. (D)—
2015Jeahpaul J. Morrell (D)—Unopposed
Lines first used in 2002
2011Jeahpaul J. Morrell (D)Cynthia Willardlewis (D)6.5
2007Derrick Shepherd (D)Shawn Barney (D)21.8
2003Lambert Boissiere Jr. (D)Patricia M. Harris (D)49.3
Lines first used in 1992
1999Lambert Boissiere Jr. (D)—Unopposed
1999 runoffLambert Boissiere Jr. (D)Herbert Cade (D)10.4
1999 special electionLambert Boissiere Jr. (D)Herbert Cade (D)3.9
1995Dennis Bagneris (D)—Unopposed
Lines first used in 1982
1991Dennis Bagneris (D)—Unopposed
1987Dennis Bagneris (D)—Unopposed
1983Dennis Bagneris (D)Henry E. Braden IV (D)7.4
Lines first used in 1972
1979Theodore M. Hickey (D)Arthur Simmons (D)64.0
1975 runoffTheodore M. Hickey (D)—Unopposed
1972Theodore M. Hickey (D)Frank W. Beckendorf (R)57.8
Lines first used in 1962
1968Charles Barham (D)—Unopposed

Primaries: 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 3

The state's districts in other chambers that share residents with this one, and the share of District 3's area in each.

U.S. House
LA-2 70%, LA-1 30%
Louisiana House of Representatives
HD-103 50%, HD-99 22%, HD-100 18%, HD-97 8%

Who lives here, compared

Grey bars show the spread of all 38 seats. Small marks are other seats in Louisiana. The black marker is District 3.

Adults with a bachelor's degree30% 76th pct · 10th of 38 in LA

Higher than 76% of seats.

White adults without a degree18% 11th pct · 34th of 38 in LA

Lower than 89% of seats.

Hispanic residents8% 68th pct · 13th of 38 in LA

Higher than 68% of seats.

Black residents55% 89th pct · 5th of 38 in LA

Higher than 89% of seats.

Asian residents4% 89th pct · 5th of 38 in LA

Higher than 89% of seats.

People per square mile1,617 86th pct · 6th of 38 in LA

Denser than 86% 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 15
70% Black · 23% college gradsD+60.5Not up in 2026District 5
48% Black · 43% college gradsD+74.6Not up in 2026District 4
55% Black · 42% college gradsD+62.8Not up in 2026District 7
57% Black · 27% college gradsD+53.9Not 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