Marietta Brew Appiah-Oppong (born in Tema), is a Ghanaian female legal practitioner and a former Attorney General of Ghana and Minister for Justice of Ghana. She was appointed by President Mahama in 2013. She is the second woman to hold this office in the country, the first being Mrs. Betty Mould-Iddrisu. Her tenure as Attorney General of Ghana ended on 6 January 2017. She was appointed to serve on the Court of Arbitration of the International Chamber of Commerce from 1 July 2018 for a three-year term. She is Honorary Council Member of the Ghana Association of Restructuring and Insolvency Advisors (GARIA).