Peter Malcolm Black is a Welsh Liberal Democrat politician, and was a Member of the Welsh Assembly for the South Wales West Region between 1999 and 2016.

The Welsh Liberal Democrats are a branch of the United Kingdom Liberal Democrats that operates in Wales. The party is led by Jane Dodds, who served as MP for Brecon and Radnorshire from August to December 2019, and MS for Mid and West Wales since May 2021. The party currently has 1 elected member in the Senedd and no Welsh seats in the UK House of Commons, but does have several members of the House of Lords. The party had 69 local councilors serving in principal authorities as of the 2022 local authority elections, up 10 from 2017.