Aimé Emmanuel Yoka is a Congolese politician who served in the government of Congo-Brazzaville as Minister of State for Justice from 2007 to 2016. Previously he was Director of the Cabinet of President Denis Sassou Nguesso from 2002 to 2007.
Yoka was born at Oyo, located in the north of Congo-Brazzaville; he is the uncle of President Denis Sassou Nguesso and a lawyer by profession.
Under Sassou Nguesso, Yoka was first appointed to the government on 28 December 1980 as Minister-Delegate for Cooperation, working at the Presidency. Subsequently he was Director of the Cabinet of the President before being appointed as Minister of Mines, Energy, and Posts and Telecommunications in August 1988. He was elected to the Central Committee of the Congolese Labour Party (PCT) for the first time at the PCT's Fourth Ordinary Congress on 26–31 July 1989, and he was retained in his ministerial post in the government appointed on 13 August 1989. He left the government when the PCT's single-party rule collapsed in 1990–1991.
Shortly after the outbreak of the 1997 civil war on 5 June 1997, Yoka was included on the National Mediation Committee. When Sassou Nguesso returned to power in October 1997, ousting President Pascal Lissouba, he scrapped the elected local authorities that had been put in place under Lissouba and directly appointed new local authorities. Sassou Nguesso appointed Yoka as mayor of Brazzaville, the capital; Yoka served in that post from 1997 to 1999, and he was Congo-Brazzaville's Ambassador to Morocco from 1999 to 2002. During that period, Yoka also chaired the commission responsible for drafting the 2002 constitution.
On 19 August 2002, Yoka was again appointed as Director of the Cabinet of President Sassou Nguesso, with the rank of Minister; accordingly, he succeeded Gérard Bitsindou in that capacity on 22 August 2002. As Director of the Presidential Cabinet, Yoka was described as "very active and very independent". He was subsequently appointed to the government as Minister of State for Justice and Human Rights on 3 March 2007, and he was succeeded as Director of the Cabinet by Firmin Ayessa on 22 May 2007.