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| Acadia | ACAD | Madison | MADI |
| Allen | ALLE | Morehouse | MORE |
| Ascension | ASCE | Natchitoches | NATC |
| Assumption | ASSU | Orleans | ORLE |
| Avoyelles | AVOY | Ouachita | OUAC |
| Beauregard | BEAU | Plaquemines | PLAQ |
| Bienville | BIEN | Pointe Coupee | PCP |
| Bossier | BOSS | Rapides | RAPI |
| Caddo | CADD | Red River | REDR |
| Calcasieu | CALC | Richland | RICH |
| Caldwell | CALD | Sabine | SABI |
| Cameron | CAME | St. Bernard | SBND |
| Catahoula | CATA | St. Charles | SCHL |
| Claiborne | CLAI | St. Helena | SHEL |
| Concordia | CONC | St. James | SJAM |
| De Soto | DESO | St. John Baptist | SJB |
| East Baton Rouge | EBR | St. Landry | SLAN |
| East Carroll | ECAR | St. Martin | SMT |
| East Feliciana | EFEL | St. Mary | SMAR |
| Evangeline | EVAN | St. Tammany | STAM |
| Franklin | FRAN | Tangipahoa | TANG |
| Grant | GRAN | Tensas | TENS |
| Iberia | IBER | Terrebonne | TERR |
| Iberville | IBVL | Union | UNIO |
| Jackson | JACK | Vermilion | VERM |
| Jefferson | JEFF | Vernon | VERN |
| Jefferson Davis | JFDV | Washington | WASH |
| La Salle | LASA | Webster | WEBS |
| Lafayette | LAFA | West Baton Rouge | WBR |
| Lafourche | LAFO | West Carroll | WCAR |
| Lincoln | LINC | West Feliciana | WFEL |
| Livingston | LIVI | Winn | WINN |