The 2009–10 RFU Championship was the 1st season (of the professionalised format) of the second division of the English domestic rugby union competitions, played between August 2009 and May 2010.

[1] New teams included Bristol who had been relegated from the Guinness Premiership 2008–09 and Birmingham and Solihull who had been promoted from National Division Two 2008–09.

During this season, Exeter Chiefs won promotion to the Aviva Premiership 2010–11 by beating Bristol in the playoff final.

The two-legged final took place at the home grounds of the two clubs involved, rather than at Twickenham.

Exeter Chiefs win the Championship and earn promotion to the 2010–11 Premiership.