Seth Nana Ofori-Twumasi (born 15 May 1990) is a professional footballer who plays as a defender or midfielder for Peterborough & District League side Oakham United.

He made his competitive debut for Newport on 11 August, versus Wolverhampton Wanderers in the Football League Cup first round.

[12] Twumasi made what he thought was a one-off appearance for Maidstone United against Bromley in the Kent Senior Cup in September 2016.

After making a number of impressive appearances for the club, Stones manager Jay Saunders revealed in late December 2016 that he did not expect the player to turn out for Maidstone again, citing that he still had Football League interest and was also busy setting up his academy.

[16] On 25 June 2021, Twumasi joined fellow National League side Dover Athletic following three seasons at Maidenhead.

Before a match between England under-20s and their Ghanaian counterparts in the U-20 World Cup in 2009, Twumasi stated he has no doubts over his allegiance, saying: "The game will be emotional, but I'm English now and that's who I want to play for, so there will be no love lost between us.