Adjoa Andoh (born 14 January 1963) is a British film, television, stage and radio actress of Ghanaian descent. She is known on the UK stage for lead roles at the RSC, the National Theatre, the Royal Court Theatre and the Almeida Theatre, and is a familiar face on British television (notably in two series of Doctor Who as companion Martha's mother Francine Jones, 90 episodes of the BBC's long-running medical drama Casualty as Staff Nurse (later Sister) Colette Griffiths and a year in the BBC's EastEnders).

Adjoa is the voice of Alexander McCall Smith's No. 1 Ladies Detective Agency; she won "Audio Book of the Year" for Tea Time for the Traditionally Built. She made her Hollywood debut in Autumn 2009 starring as Nelson Mandela's Chief of Staff Brenda Mazibuko alongside Matt Damon and Morgan Freeman as Mandela in Clint Eastwood's Invictus.