List of United States senators from Louisiana

was admitted to the Union on April 30, 1812, and elects senators to class 2 and class 3. Russell Long was the state's longest-serving senator, serving from 1948–1987. Its current senators are Republicans Bill Cassidy and John Kennedy.
Louisiana is one of fifteen states alongside California, Colorado, Georgia, Hawaii, Idaho, Maine, Massachusetts, Minnesota, Missouri, Nevada, Pennsylvania, South Dakota, Utah, and West Virginia to have a younger senior senator and an older junior senator.

List of senators

! 1
! rowspan=4 | 1
! 2
! rowspan=3 | 3
! rowspan=5 | 2
! 4
! rowspan=6 | 5
! rowspan=3 | 3
! rowspan=10 | 4
! rowspan=3 | 6
! rowspan=2 | 7
! rowspan=4 | 8
! rowspan=3 | 5
! rowspan=5 | 9
! rowspan=4 | 6
! rowspan=7 | 10
! 7
! 8
! rowspan=5 | 9
! 11
! rowspan=3 | 12
! rowspan=3 | 10
! rowspan=6 | 13
! rowspan=4 | 11
! rowspan=3 | 14
! rowspan=3 | 12
! rowspan=5 | 15
! rowspan=2 | 13
! rowspan=3 | 16
! rowspan=3 | 14
! rowspan=5 | 17
! rowspan=3 | 15
! rowspan=4 | 16
! rowspan=6 | 18
! rowspan=2 | 17
! rowspan=7 | 18
! rowspan=8 | 19
! rowspan=3 | 19
! rowspan=12 | 20
! rowspan=2 | 20
! 21
! rowspan=2 | 22
! rowspan=7 | 23
! rowspan=3 | 21
! rowspan=10 | 24
! 22
! rowspan=21 | 23
! 25
! rowspan=23 | 26
! 24
! rowspan=13 | 25
! rowspan=9 | 27
! rowspan=9 | 26
! rowspan=6 | 28
! rowspan=6 | 27
! rowspan=6 | 29