The 2008–09 season of Barnsley Football Club saw the club participate in the Football League Championship.
The first signing for the new season was announced on 25 June; Canadian international striker Iain Hume in a £1.2 million switch from relegated Leicester City [1], the clubs first seven-figure signing since 1999. On 27 June Barnsley again dipped into the transfer market to sign Argentine defensive midfielder Hugo Colace from Newell's Old Boys and French left winger come left-back Mounir El Haimour from Swiss side Neuchâtel Xamax. On 2 July, a transfer was secured for experienced central defender Darren Moore of Derby County. The final pre-season transfer came on 8 August with a season-long loan deal for former Dutch U21 star Maceo Rigters from Blackburn Rovers. On 26 January 2009, it was confirmed that Daniel Bogdanovic had signed for Barnsley for an undisclosed fee, signing a deal until 2010. Michael Mifsud joined Barnsley on loan until the end of the season on 2 February 2009 on the same day as Andranik Teymourian and Adam Hammill joining fellow Malta team-mate Daniel Bogdanovic at Oakwell.