Hywel Dda University Health Board (HDUHB) (Welsh: Bwrdd Iechyd Prifysgol Hywel Dda) is the local health board of NHS Wales for the west of Wales.

The local health board is named in honour of historic south west Wales king Hywel Dda.

Hywel Dda University Health Board provides healthcare services to a total population of around 385,615 throughout Carmarthenshire, Ceredigion and Pembrokeshire.

The headquarters of Hywel Dda is based in Hafan Derwen, St David's Park, Carmarthen, Wales.

[2] Acute hospitals are marked with a * The board spent £3,676,211 on private health providers between April 2013 and March 2015 to carry out NHS work on elective surgery because difficulties with recruitment impaired its capacity for elective surgery.