African nationalist politician who was a leader in the opposition against the single-party rule of Jomo Kenyatta (Kenyatta, Jomo) and his successor Daniel arap Moi.

Odinga was a member of the Kenya's second largest ethnic group, the Luo. Like many other prominent East Africans, he was educated at Makerere University College and was originally a teacher.

From the late 1940s Odinga was an associate of Kenyatta's in the campaign for Kenya's independence from Britain; he was active in recruiting Luo support for the movement. From 1952 to 1957 he was president of the Luo Union, a political and social organization, and in 1957 he was elected to the Legislative Council as member for Central Nyanza. In 1960 he became vice president of the newly formed Kenya African National Union (KANU).

Odinga was elected a member of the House of Representatives in 1963, and when Kenya became independent in December of that year, he became minister for home affairs (1963–64) and then vice president. His socialist views conflicted with Kenyatta's more centrist ideology, however, and in 1966 he broke away from KANU to form a left-wing opposition party, the Kenya People's Union (KPU). The KPU was outlawed by Kenyatta in 1969, and some of its members, including Odinga, were placed under government detention. After his release in 1971, Odinga rejoined KANU, but he never regained Kenyatta's confidence, and he was not permitted to run for parliament.

Odinga's exclusion from parliament continued under Moi, who became president in 1978. Odinga continued to criticize government corruption and to press for improved human rights and a multiparty political system. He was expelled from KANU in 1982 and imprisoned for several months. In 1991 he helped found the Forum for the Restoration of Democracy (FORD), and later that year Moi, under pressure at home and from the international community, legalized opposition parties. Ethnic and personal rivalries split FORD, however, and Odinga came in fourth in multiparty presidential elections held in 1992.

Odinga's son, Raila Odinga, also became an active player in Kenyan politics, lending key support to several prominent political leaders. He ran for president in an election held in December 2007; the incumbent, Mwai Kibaki (Kibaki, Mwai), was declared the winner despite many instances of voting irregularities. Raila Odinga and many Kenyans disputed the outcome, and the country was gripped by chaos and violence. A power-sharing agreement brokered two months later called for the formation of a coalition government in which Odinga was to hold the newly created position of prime minister.

Oginga Odinga published an autobiography, Not Yet Uhuru, in 1967.