I decided to create this thread after seeing a guy fumbling that no one can impeach Gov. Fubara of rivers state. There has been 6 state governors impeachment since 1999.

Under certain terms and conditions, the Governor may be replaced by another, for example through death, impeachment or if an election is annulled.

Ayo Fayose (Born 15 November 1960) was impeached as the Executive Governor of Ekiti State, Nigeria on 16 October 2006 on alleged mismanagement of public funds and serial killings[1]

Peter Obi (born 19 July 1961) was impeached as the Executive Governor of Anambra State on 2 November 2006 on alleged gross misconduct. Peter Obi was elected governor of Anambra on March 17, 2006. He was impeached 8 months after winning governorship election by the State House of Assembly. Obi would later reveal that one of the reasons he was impeached was his refusal to inflate the government’s yearly budget.

Joshua Dariye, was impeached as the Executive Governor of Plateau State, Nigeria on 13 November 2006 on alleged siphon of public fund and money laundering in London[3]

Rashidi Adewolu Ladoja, was impeached as the Executive Governor of Oyo State, Nigeria on 12 January 2006 by 18 Legislators[4]

Diepreye Alamieyeseigha was impeached as the Executive Governor of Bayelsa State, Nigeria on 9 December 2005 on alleged corruption which includes, theft of public funds, abuse of office, and money laundering.[5]

Murtala Nyako was impeached as the Executive Governor of Adamawa State, Nigeria in July 2014 on alleged corruption which includes theft of public funds, abuse of office and money laundering[6]

Source: https://en.m.wikipedia.org/wiki/List_of_impeached_Nigerian_state_governors