Dyfed-Powys Police (Welsh: Heddlu Dyfed Powys) is the territorial police force responsible for policing Ceredigion, Carmarthenshire, Pembrokeshire (which make up Dyfed) and the county of Powys, in Wales. The territory it covers is the largest police area in England and Wales, and the fourth largest in the United Kingdom. The force's headquarters are located in the town of Carmarthen.

The force was formed in 1968, with the merger of the Carmarthenshire and Cardiganshire Constabulary, Pembrokeshire Constabulary and the Mid Wales Constabulary.

The Dyfed-Powys region has over 350 miles of coastline and many remote rural communities - yet also a number of old industrial areas that are currently experiencing significant change and redevelopment.

Despite the size of the area, the population is under 500,000, although it is boosted each year with large tourist numbers. The small population is reflected in the number of employees; 1,183 full-time officers (of whom 905 are of the rank of constable). The force currently have 167 Special Constables, 25 Police Community Support Officers (PCSOs) and 10 traffic wardens. It is the third smallest police force in England and Wales, in terms of number of officers, after Warwickshire Police and the City of London Police.

Dyfed-Powys Police 40th anniversary
The year 2008 marked the 40th anniversary of Dyfed-Powys Police. To celebrate this occasion, Dyfed-Powys Police held a free family fun open day on the 28th of September 2008 at their police HQ, Llangunnor, Carmarthen. There were several activities and demonstrations to watch. This was a day to remember, previously Carmarthenshire and Ceredigion Constabularies had now merged into the largest Police force by area in the United Kingdom.

All Wales force merger
Under proposals made by the Home Secretary Charles Clarke on February 6, 2006, it was proposed to merge Dyfed-Powys Police with North Wales Police, South Wales Police and Gwent Police, to form a single strategic force for all of Wales. Following fierce opposition to the proposed changes from many quarters (including the police themselves) during the summer of 2006, the new Home Secretary John Reid abandoned the proposed restructuring of the police service in England and Wales. It is to be seen whether further proposals are brought forward for consideration during the lifetime of the current Parliament.

Police stations
39 Stations remain as of 2007/08.

Carmarthenshire

• Carmarthen Police Station (Divisional Headquarters)
• Llanelli Police Station
• Ammanford Police Station
• Burry Port Police Station
• Cross Hands Police Station
• Felinfoel Police Station
• Kidwelly Police Station
• Llandeilo Police Station
• Llandovery Police Station
• Llwynhendy Police Station
• Newcastle Emlyn Police Station
• Pencader Police Station
• St Clears Police Station
• Whitland Police Station

Ceredigion

• Aberystwyth Police Station (Divisional Headquarters)
• Aberaeron Police Station
• Cardigan Police Station
• Lampeter Police Station
• Llandysul Police Station
• Tregaron Police Station

Pembrokeshire

• Haverfordwest Police Station (Divisional Headquarters)
• Crymych Police Station
• Fishguard Police Station
• Milford Haven Police Station
• Narberth Police Station
• Neyland Police Station
• Pembroke Dock Police Station
• Saundersfoot Police Station
• St Davids Police Station
• Tenby Police Station

Powys

• Brecon Police Station (Divisional Headquarters)
• Builth Wells Police Station
• Crickhowell Police Station
• Hay-on-Wye Police Station
• Knighton Police Station
• Llandrindod Wells Police Station
• Llanfair Caereinion Police Station
• Llanfyllin Police Station
• Llanidloes Police Station
• Machynlleth Police Station
• Newtown Police Station
• Presteigne Police Station
• Rhayader Police Station
• Welshpool Police Station
• Ystradgynlais Police Station