The 2015 Louisiana State Senate election was held on October 24, 2015, with runoff elections taking place on November 21, 2015, to determine which party would control the Louisiana State Senate for the following four years in the 71st Louisiana Legislature. All 39 seats in the Louisiana State Senate were up for election and the primary was held on October 24, 2015. The elections for state senate were held alongside concurrent State House elections. Under the Louisiana primary system, all candidates appeared on the same ballot, regardless of party. Four districts held runoff elections on November 21, 2015, due to no candidate receiving a majority of the vote in the general election. Prior to the election, 26 seats were held by Republicans and 13 seats were held by Democrats. The general election saw Democrats gain a single seat, meaning that the Republicans retained their majority in the State Senate.
Retirements Democrats District 4: Edwin R. Murray was term-limited. District 7: David Heitmeier retired. District 12: Ben Nevers was term-limited. District 15: Sharon Weston Broome was term-limited. District 29: Richard Gallot Jr. retired.
Republicans District 1: A. G. Crowe retired. District 18: Jody Amedee was term-limited. District 24: Elbert Guillory retired. District 35: Robert Kostelka was term-limited. District 36: Robert Adley was term-limited. District 38: Sherri Smith Buffington was term-limited.
Closest races Seats where the margin of victory was under 10%:
(gain)
Results District 1
District 2
District 3
District 4
District 5
District 6
District 7
District 8
District 9
District 10
District 11
District 12
District 13
District 14
District 15
District 16
District 17
District 18
District 19
District 20
District 21
District 22
District 23
District 24
District 25
District 26
District 27
District 28
District 29
District 30
District 31
District 32
District 33
District 34
District 35
District 36
District 37
District 38
District 39
References