Sir Paul Michael Williams, OBE KStJ, DL (born 25 June 1948), is a British former National Health Service manager, who was Chief Executive of NHS Wales between 2009 and 2011.

He was born in Wales,^[1] and joined the NHS as a clerk at the Welsh Hospital Board in 1966.^[2] Later in his career he became, successively, Assistant District General Manager of Mid Glamorgan Health Authority, Chief Executive of Bridgend NHS Trust (1993–99), ^[3] Chief Executive of Bro Morgannwg NHS Trust, and Chief Executive of Abertawe Bro Morgannwg University Health Board. He was Chair of NHS Staff College Wales, 1995-2001.^[3] He was seconded as Chief Executive of NHS Wales for a two-year period starting in January 2009.

In April 2013, it was announced by Wales' First Minister Carwyn Jones that Williams would chair a new Commission on Public Service Governance and Delivery, to make recommendations for fundamental reforms of local government organisation in Wales.^[4] The Commission reported in January 2014.^[5]

He was appointed Officer of the Order of the British Empire (OBE) in 2000 for services to the NHS in Wales,^[1] was UK president of the Institute of Healthcare Management (IHM) from 2002–05, and was High Sheriff for the County of South Glamorgan in 2007/08.^[1] He was appointed as Chancellor of the Order of St John, Priory for Wales, in April 2011.^[2] He was knighted in the 2011 Birthday Honours.^[6][7] He is active within Freemasonry.^[8]