Louisiana's 21st State Senate district
| Louisiana's 21st State Senate district  | |||
|---|---|---|---|
| Senator | 
  | ||
| Registration | 38.3% Democratic 33.7% Republican 28.0% No party preference  | ||
| Demographics | 63% White 25% Black 6% Hispanic 1% Asian 2% Native American 3% Other  | ||
| Population (2019) | 121,467 | ||
| Registered voters | 75,111 | ||
Louisiana's 21st State Senate district is one of 39 districts in the Louisiana State Senate. It has been represented by Republican Bret Allain since 2012.