20th Century Masters – The Millennium Collection: The Best of the Mamas & the Papas

20th Century Masters – The Millennium Collection: The Best of the Mamas & the Papas is a compilation album by the folk-rock vocal group The Mamas & the Papas. The album was only released on CD and cassette by Geffen and MCA Records.

Critical reception
Stephen Thomas Erlewine of AllMusic says The Mamas & the Papas 20th Century Masters — The Millennium Collection is "an irresistible 11-song summary of their MCA recordings." While it may be missing "a couple of noteworthy songs", he suggests "this is an excellent introduction for neophytes and a great sampler for casual fans."