The Oyo State Civil Service Commission was established in 1976 sequel to the creation of new States from the old Western State. The Commission on its own is a creation of Section 197 of the 1999 Constitution of the Federal Republic of Nigeria (as amended) like all other States Civil Service Commission in the Federation.

It derives its power to make appointments, promotions and exercise disciplinary control over public servants from Section 202 of the same Constitution. The Constitution specifically emphasises that, in exercising its power to make appointment or to exercise disciplinary control over persons, the Commission shall not be subject to the direction or control of any authority or person.

Members of the Commission are appointed by the State Governor for a tenure of five (5) years. Appointees are usually experienced persons who, in the opinion of the Governor, are of proven integrity and sound political judgment.

The membership of the Commission comprises of a Chairman and not less than two (2) and not more than four (4) others. Presently, the Commission has four (4) Directorates namely; Personnel, Recruitment, Finance and Accounts and Planning, Research and Statistics.