Casey & District Multiple Birth Association covers the following municipalities:
- Baw Baw Shire Council
- Cardinia Shire Council
- City of Casey
- City of Greater Dandenong
- East Gippsland Shire Council
- Latrobe City Council
- South Gippsland Shire Council
- Wellington Shire Council
We currently have members receiving support, friendship and member benefits from the following suburbs near you:
| Berwick | Botanic Ridge | Cannon Creek |
| Clyde | Clyde North | Cockatoo |
| Cranbourne | Cranbourne East | Cranbourne North |
| Cranbourne West | Endeavour Hills | Garfield |
| Gembrook | Hallam | Hampton Park |
| Hastings | Hazelwood North | Jeeralang Junction |
| Keysborough | Korumburra | Lakes Entrance |
| Lyndhurst | Meeniyan | Narre Warren |
| Narre Warren North | Narre Warren South | Newlands Arm |
| Noble Park | Officer | Pakenham |
| Ranceby | Stratford | Upper Beaconsfield |
| Warragul |