Alexander Charles Carlile, Baron Carlile of Berriew (born 12 February, 1948) is a Liberal Democrat member of the House of Lords.

He was made a Life Peer in 1999. He has three dughters named Anna, Eve and Ruth. He has four grandchildren, Jimi (12), Tallula (9), Jacob (4) and Reuben (0). He is a barrister and was previously a Liberal Democrat Member of Parliament for Montgomery from 1987 to 1997.

Lord Carlile acted in 2005 as the independent reviewer of British anti-terrorist laws, advocating the development of legislation in conformity with provisions of the Bush government's U.S. P.A.T.R.I.O.T. Act. Among those civil liberties targeted included the right to a trial, the requirement that charges be issued against the imprisoned, and limits on government wiretapping of citizens. Carlile contributed to the historic diminishment of civil liberties in Britain as championed by the Labour Party and Home Secretary Charles Clarke, under the banner of protecting the British populace from Muslim-British citizens.

According to the Register of Lords' Interests, Alex Carlile is inter alia an advisor to Mr. R. Hobson; a paid director of 5 Bell Yard Ltd. and the Wynnstay Group of agricultural feed manufacturers, agricultural goods merchants, and fuel oil distributors; a Deputy High Court Judge; a member of Council at JUSTICE, the British affiliate of The International Commission of Jurists (ICJ), dedicated to the coordination of international human rights law and principles; and a trustee of Nuffield Trust, a UK health care think tank.