Peter Gregory Obi (born 19 July 1961) is a Nigerian politician and businessman who served as the governor of Anambra State from 17 March 2006 until his impeachment on 3 November 2006. Reinstated on 9 February 2007, he continued his tenure until 2010 when he was re-elected for a second term, ending on 7 March 2014.

Born in Onitsha, Anambra State, Nigeria, Obi attended Christ the King College, Onitsha, for his secondary education, obtaining a West African Examination Council (WAEC) certificate. He studied Philosophy at the University of Nigeria in Nsukka, Enugu State, graduating in 1984. He later pursued advanced business studies at institutions like Lagos Business School, International Institute for Management Development in Switzerland, Harvard Business School, Saïd Business School in England, Cambridge Judge Business School, and Kellogg School of Management.

Obi contested for the Governor of Anambra State under the All Progressives Grand Alliance (APGA) in 2003. He was defeated by Chris Ngige, but Ngige’s victory was later annulled by the court, declaring Obi the winner. He began his administration on 17 March 2006. He was removed from office by the state legislature on 3 November 2006, citing 'gross misconduct'. Virginia Etiaba replaced him as the first female governor in Nigeria. Obi was reinstated on 9 February 2007 after a court ruling.

On 17 March 2010, Obi was re-elected for a second term, serving until 17 March 2014, when he passed power to Willie Obiano. Under the Peoples Democratic Party (PDP), he sought the Nigerian vice presidential nomination in 2019 alongside presidential candidate Atiku Abubakar, but they lost to Muhammadu Buhari of the All Progressives Congress (APC). After the 2022 primaries, Obi defected to the Labour Party, replacing Atiku’s ticket with Yusuf Datti Baba-Ahmed as his vice presidential candidate for the 2023 election.

Obi’s presidential campaign emphasized populism, drawing support from groups like the 'Obidients' and the 'Village Movement'. His core message of frugality, accountability, and economic prudence resonated with young voters dissatisfied with the two major parties, APC and PDP. Before the election, he received widespread support through marches like the One Million Man Marches across Nigeria.

During the 2023 election, Obi received 6,101,533 votes, placing third behind Bola Tinubu (APC) and Atiku Abubakar (PDP). Despite allegations of voter manipulation and rigging, Obi stated he would challenge the results. His candidacy was marked by a strong grassroots movement, with endorsements from figures like Aisha Yesufu.

Obi’s political career includes roles such as chairman of the Nigerian Security and Exchange Commission (SEC) after the 2015 general election. He has been a vocal critic of economic policies, security issues, and governance failures, including the 2026 terrorist attack in Niger State and the 2024 tax reforms by President Bola Tinubu. His critiques have drawn comparisons to his economic policies and his stance on education and social welfare.

His work includes donations to schools, healthcare facilities, and educational programs. He has emphasized education as a priority, advocating for better access to learning opportunities, especially for inmates in correctional centers. His contributions include donations to St. John Vianney Science College, Nnewi, and support for students facing remand in Edo State.

As a devout Catholic and papal knight, his religious background has influenced his public image. He has been awarded numerous honors, including the Man of the Year by The Sun in 2007, the Most Prudent Governor by This Day in 2009, and the Distinguished Alumnus Award from the Lagos Business School Alumni Association.

Obi’s personal life includes marriage to Margaret Brownson Usen, with two children: Peter Gregory Oseloka and Gabriella Frances Nwamaka. He has faced scrutiny over offshore business ventures, including shell companies linked to tax havens like the British Virgin Islands and Barbados, though he has denied wrongdoing and clarified his business practices.

Critics and supporters have debated his candidacy, with allegations of religious motivations among Northern Christians and claims of political maneuvering. His defection to the African Democratic Congress (ADC) in 2025 and subsequent statements have sparked further discussions about his leadership and future political trajectory.