Reserve Defence Forces
| Reserve Defence Force | |
|---|---|
| Na hÓglaigh Cúltaca | |
 | |
| Founded | 1 October 2005 |
| Service branches | Army Reserve Naval Service Reserve |
| Headquarters | Directorate of Reserve Forces, Operations Division DFHQ |
| Website | www |
| Leadership | |
| Chief of Staff | Lieutenant General Rossa Mulcahy |
| Deputy Chief of Staff for Operations | Major General John Whittaker |
| Personnel | |
| Reserve personnel | 1,807 personnel (Establishment: 4,069; March 2026) |
The Reserve Defence Forces (RDF) (Irish: Na hÓglaigh Cúltaca) are the combined reserve components of the Irish Defence Forces. The RDF is organised into the First Line Reserve (FLR) and an active Second Line Reserve. The First Line Reserve is composed of former members of the Permanent Defence Force (PDF) and, as of March 2026, had a strength of 204. The Second Line Reserve comprises the Army Reserve (AR) with, as of March 2026, a strength of 1,473 out of an established strength of 3,869, and the Naval Service Reserve (NSR), with a strength of 134 out of an established strength of 200.
The RDF was established in its current form on 1 October 2005, and replaced the Second Line Reserve, previously named An Fórsa Cosanta Áitiúil (FCÁ) in the case of the Army Reserve, and An Slua Muirí in the case of the Naval Service Reserve. The RDF has undergone significant reorganisation and modernisation, in tandem with the Permanent Defence Force, as part of the 'Single Force' concept.