Post-nominal letters inAntigua and Barbuda include:
| Office | Post-nominal |
|---|---|
| The Most ExaltedOrder of the National Hero | |
| Knight of the Order of the National Hero | KNH |
| Dame of the Order of the National Hero | DNH |
| The Most DistinguishedOrder of the Nation | |
| Knight Grand Collar | KGN |
| Dame Grand Collar | DGN |
| Knight Grand Cross | KGCN |
| Dame Grand Cross | DCGN |
| Knight Commander | KCN |
| Dame Commander | DCN |
| Commander | CN |
| Officer | ON |
| Member | MN |
| The Most IllustriousOrder of Merit | |
| Grand Cross | GCM |
| Grand Officer | GOM |
| Commander | CM |
| Officer | OM |
| Member | MM |
| The Most PreciousOrder of Princely Heritage | |
| Grand Cross | GCH |
| Grand Officer | GOH |
| Commander | CH |
| Officer | OH |
| Member | MH |