A list of some of the Local Groups, Clubs, Associations & Organisations.
- Caisleán Nua CCE (Comhaltas)
- Newcastle Community Alert
- Newcastle Community Development Group
- Newcastle Community Hall
- Newcastle Community Youth & Resource Group
- Newcastle GAA Club
- Newcastle Historical Society
- Newcastle Mens Shed
- Positive Steps Together
- Newcastle Tidy Towns
- Newcastle Vintage Club
- Liam Lynch Commemoration Group
- Knockmealdown Active
- Gaeltacht Area – Keeping Irish Alive Group
