2023Final results
2023 election for Louisiana Senate District 21
Louisiana State Senate · Louisiana
Robert Allain (R) won with 43.8% of the vote, defeating Henry "Bo" LaGrange (R) by 12.4 points.
Robert AllainRepublican · winner
43.8%10,815
Henry "Bo" LaGrangeRepublican
31.4%7,745
Stephen SwiberRepublican
24.9%6,138
24,698 votes
Source: Louisiana Secretary of StateUpdated Sep 30, 2026, 1:09 PM ET
The seat over time
D − R margin in this seat's races around 2023
Races before and after
Source: Louisiana Secretary of StateUpdated Sep 30, 2026, 1:09 PM ET