| ACC SWIMMING CARNIVALS 2021 - confirmed | # | ||
| A DIV Wed 24/03/21 | HBF Stadium (Indoor 8 lane) | 9 | |
| Sacred Heart | |||
| CBC Fremantle | |||
| All Saints | |||
| Chisholm | |||
| St Stephen's (Duncraig) | |||
| Mercedes | |||
| John XXIII | |||
| Newman | |||
| Mandurah CC | ↑ | Elevated from B Div | |
| B DIV Thurs 25/3/21 | HBF Stadium (Indoor 8 lane) | 9 | |
| St Mark's | ↓ | Relegated from A Div | |
| Corpus Christi | |||
| Mazenod | |||
| St Brigid's | |||
| Kolbe | |||
| Ursula Frayne | |||
| Prendiville | |||
| Peter Moyes | |||
| Nagle | ↑ | Elevated from C Div | |
| C DIV Tues 23/03/21 | HBF Stadium (Indoor 8 lane) | 8 | |
| Frederick Irwin AS | ↓ | Relegated from B Div | |
| St Mary MacKillop | |||
| Kennedy BC | |||
| Lake Joondalup | |||
| John Septimus Roe | |||
| Georgiana Molloy | |||
| Mandurah Baptist | |||
| Kingsway CC | ↑ | Elevated from D Div | |
| D DIV Fri 26/3/21 | HBF Stadium (Indoor 8 lane) | 8 | |
| Swan Christian | ↓ | Relegated from C Div | |
| La Salle | |||
| Lumen Christi | |||
| Servite | |||
| John Paul | |||
| St Norbert | |||
| Emmanuel CC | |||
| Guildford Grammar | new school 2020 | ||
| E DIV Mon 22/3/21 | HBF Stadium (Indoor 8 lane) | 8 | |
| Bunbury Cathedral Grammar | No elevation from E Div | ||
| St Stephen’s (Carramar) | ↓ | Relegated from D Div | |
| Carey (Harrisdale) | |||
| Mater Dei | |||
| Irene McCormack | |||
| Seton | |||
| Swan Valley | |||
| Living Waters | |||
| No elevation from F Div from 2019 | |||
| F DIV Fri 19/03/21 | HBF Outdoor 10 lane | 8 | |
| Geraldton Grammar | ↓ | Relegated from E Div | |
| Helena | |||
| Tranby | |||
| Peter Carnley ACS | |||
| Austin Cove Baptist | |||
| Providence CC | |||
| Quinns | ↑ | Elevated for Kearnan | |
| St George's AS | ↑ | Elevated from G Div | |
| G DIV Thurs 18/03/21 | HBF Outdoor 10 lane | 8 | |
| Aranmore | |||
| St Joseph's Albany | |||
| St Joseph's Northam | |||
| John Wollaston | |||
| Holy Cross | |||
| South Coast Baptist | Status Quo | ||
| Mercy | |||
| Rehoboth CC | ↑ | Elevated from H Div | |
| H DIV Wed 17/03/21 | HBF Outdoor 10 lane | 8 | |
| Carmel | |||
| Cornerstone | |||
| Strathalbyn CC | |||
| Court Grammar | |||
| Mundaring CC | |||
| Grace Christian | |||
| St Andrew's | |||
| St James' Anglican School | ↑ | Elevated from I Div | |
| 2 schools to be relegated in 2021 | |||
| I DIV Tues 16/03/21 | HBF Outdoor 10 lane | 8 | |
| Ellenbrook CC | ↓ | Relegated from H Div | |
| Alkimos Baptist | |||
| The King's College | |||
| Immaculate Heart Catholic College | |||
| Mother Teresa Catholic College | |||
| Fremantle Christian College | |||
| Southern Hills CC | |||
| Foundation Christian | |||
| J DIV Mon 15/3/21 | HBF Outdoor 10 lane | 7 | |
| Edmund Rice | Moved to new division | ||
| St Mary Star of the Sea | Existing member | ||
| Emmanuel Christian School | Withdrawn | ||
| Carey Baptist - Forrestdale | New school | ||
| St John Bosco College | New school | ||
| International School | New school | ||
| Heritage College | New school | ||
| Northshore Christian GS | New school | ||
| NB: St Luke's 2020 TBC. Geraldton GS, Cornerstone, compete only in swimming. Dale CC, Clontarf & St Mary SSC only in Aths. Kearnan out for both 2021. | |||