David Rees "Dai" Lloyd (born 2 December 1956 in Tywyn, Gwynedd) is a retired Welsh politician and GP.

Lloyd was latterly Plaid Cymru's Shadow Secretary for Culture and Infrastructure, as well as being Chair of the Plaid Cymru Senedd Group and Chair of the Senedd Health, Social Care, and Sport Committee.

In 1995 he sought election for Cockett ward, hitherto regarded as a Labour stronghold.

He was the Senedd Member for South Wales West from 1999 until 2011, when Plaid failed to win the second seat on the regional list.

[3] He announced his decision to only stand in a constituency at the 2021 Senedd election and not on the list, he stood and finished 3rd with 14.5% in Swansea West in doing so he qualified for a resettlement grant of £31,622[4] as he was an unsuccessful candidate, something he was criticised for during the campaign.