Isiaka Abiola Ajimobi (born 16 December 1949) is a Nigerian politician from Oyo State, south-western Nigeria.
He was formerly the Managing Director/Chief Executive Officer of the National Oil and Chemical Marketing Company a subsidiary of Shell Petroleum, Nigeria.
He left the oil sector in 2002 after 26 years, and was elected in 2003 as a Senator of the Republic of Nigeria representing Oyo South Senatorial District on the platform of the Alliance for Democracy (AD).
After one term in the senate, he contested in 2007 for the governorship of Oyo state under the banner of the All Nigeria People's Party, a bid which he lost.
He recontested again in the April 2011 elections under the Action Congress of Nigeria and was elected Governor of Oyo State in a closely contested vote.