Football Australia has confirmed the Match Official appointments for the Liberty A-League 2023/24 Round 21 matches.
| Melbourne City FC v Central Coast Mariners | Saturday 23 March 2024 | |||
| City Football Academy | 4:00 PM (Local) | 4:00 PM (AEDT) | ||
| Referee | Kate Jacewicz | Assistant Referee 1 | Joanna Charaktis | |
| Fourth Official | Caitlin Williams | Assistant Referee 2 | Laura Moya | |
| Newcastle Jets v Melbourne Victory | Saturday 23 March 2024 | |||
| No.2 Sportsground | 4:00 PM (Local) | 4:00 PM (AEDT) | ||
| Referee | Rebecca Durcau | Assistant Referee 1 | Emma Kocbek | |
| Fourth Official | Mikayla Ryan | Assistant Referee 2 | Maggie Price | |
| Western Sydney Wanderers FC v Western United FC | Saturday 23 March 2024 | |||
| Wanderers Football Park | 6:00 PM (Local) | 6:00 PM (AEDT) | ||
| Referee | Casey Reibelt | Assistant Referee 1 | Maddy Allum | |
| Fourth Official | Bec Mackie | Assistant Referee 2 | Danielle Anderson | |
| Canberra United v Wellington Phoenix | Sunday 24 March 2024 | |||
| McKellar Park | 2:00 PM (Local) | 2:00 PM (AEDT) | ||
| Referee | Isabella Mossin | Assistant Referee 1 | Lauren Hargrave | |
| Fourth Official | Georgia Ghirardello | Assistant Referee 2 | Delfina Shakespear | |
| Sydney FC v Adelaide United | Sunday 24 March 2024 | |||
| Leichhardt Oval | 2:15 PM (Local) | 2:15 PM (AEDT) | ||
| Referee | Kelly Jones | Assistant Referee 1 | Sarah Ho | |
| Fourth Official | Isabella Libri | Assistant Referee 2 | Amber Morris | |
| Brisbane Roar FC v Perth Glory | Sunday 24 March 2024 | |||
| Perry Park | 3:00 PM (Local) | 4:00 PM (AEDT) | ||
| Referee | Caitlin Williams | Assistant Referee 1 | Mi Suk Park | |
| Fourth Official | Page Malau-Aduli | Assistant Referee 2 | Vicky Clark | |
