Onyekachi Donatus Okonkwo (born 13 May 1982 in Aba) is a Nigerian football midfielder.

Okonkwo caused a stir in Europe by signing a pre-contract agreement with German side FC Köln only to leave the club a week later to sign a four-year deal at Swiss side FC Zürich saying that he had only ever agreed to a one-week trial at the German team.

Despite FC Köln's sporting director Klaus Horstmann threatening to take the matter to FIFA in order for him to fulfil his obligations to his side, Okonkwo says he did not breach any rules in moving to Switzerland.

On 26 June 2012 Okonkwo rejoined Orlando Pirates[1] and next year, on 12 July 2013, signed with local rivals Mpumalanga Black Aces.

[2] He won his first international cap for Nigeria in a 2008 Africa Cup of Nations qualifier against Lesotho in October 2006.