Monsurat Olajumoke Sunmonu is a Nigerian politician who served as a senator representing Oyo Central senatorial District between 2015 and 2019. She represented Oyo Central Senatorial District, having won the election held on 28 March 2015. She chaired the Senate Committee on Foreign Affairs. Prior to becoming a senator, she was the Speaker of the Oyo State House of Assembly, Nigeria. While in the House of Assembly, she was the member representing Oyo East and Oyo West Local Governments. She became the first female Speaker in the history of Oyo State on 10 June 2011.

Oyo State is an inland state in southwestern Nigeria. Its capital is Ibadan, the third most populous city in the country and formerly the second most populous city in Africa. Oyo State is bordered to the north by Kwara State for 337 km, to the east by Osun State for 187 km, partly across the River Osun, and to the south by Ogun State, and to the west by the Republic of Benin for 98 km. With a projected population of 7,976,100 in 2022, Oyo State is the sixth most populous in the Nigeria.