Royal Welsh
| Dates | Locations | Higher Formation/Remarks |
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| . | The Royal Welsh Regiment | . |
| 1999.07.01 | Formed with Headquarters at Maindy Barracks, Cardiff as part of the restructuring of the TA by the amalgamation of 3rd (Volunteer) Battalion The Royal Welch Fusiliers and 2nd (Volunteer) Battalion The Royal Regiment of Wales (24th/41st Foot) | . |
| . | HQ Company at Cardiff | . |
| . | A (Royal Welch Fusiliers) Company at Colwyn Bay with Pltn at Caernarfon. Formed by amalgamation of B Company and D Company 3rd Battalion The Royal Welch Fusiliers | . |
| . | B (Royal Regiment of Wales) Company at Swansea. Formed by redesignation of A Company 2nd Battalion The Royal Regiment of Wales | . |
| . | C (Royal Regiment of Wales) Company at Maindy Barracks, Cardiff with Pln at Pontypridd. Formed by amalgamation of HQ Company and C Company 2nd Battalion The Royal Regiment of Wales | . |
| . | D (Royal Welch Fusiliers) Company at Wrexham with Pln at Queensferry. Formed by amalgamation of HQ Company and A Company 3rd Battalion The Royal Welch Fusiliers. | . |
| 2006.03.01 | As part of the restructuring of the infantry announced in 2004, the regiment became the TA battalion of the new amalgamated regiment of Wales, The Royal Welsh | . |
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| . | 3rd Battalion The Royal Welsh | . |
| 2006.03.01 | Formed by redesignating 2nd (Volunteer) Battalion The Royal Regiment of Wales (24th/41st Foot) | . |
| . | RHQ and HQ Company at Maindy Barracks, Cardiff | . |
| . | A (RWF) Company at Hightown Barracks, Kingsmills Road, Wrexham | . |
| . | B (RRW) Company at Army Reserve Centre, Alamein Road, Morfa Swansea | . |
| . | C (RRW) Company at The Broadway, Pontypridd | . |
| . | D (RWF) Company at Army Reserve Centre, Groes Road, Colwyn Bay | . |
| 20013 | RHQ and HQ Company at Maindy Barracks, Cardiff | . |
| . | A Company at Hightown Barracks, Kingsmills Road, Wrexham and Queensferry disbanded Nov 2013 | . |
| . | B Company at Army Reserve Centre, Alamein Road, Morfa Swansea | . |
| . | C Company at The Broadway, Pontypridd | . |
| . | D Company at Army Reserve Centre, Groes Road, Colwyn Bay and Caernarfon. To consolidate at Colwyn Bay by Dec 2016 | . |
| 201? | Reserve Light Role Infantry in 11 Infantry Brigade | 11 Infantry Brigade |
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