<P> The ninth and final season of One Tree Hill , an American television series created by Mark Schwahn for The WB Television Network . The series was officially renewed by The CW for a ninth season on May 17 , 2011 ; two days later , the network announced that the ninth season would serve as the series ' final season . Premiering on January 11 , 2012 , the series aired its 13 episodes uninterrupted . </P>
<P> The ninth and final season of One Tree Hill , an American television series created by Mark Schwahn for The WB Television Network . The series was officially renewed by The CW for a ninth season on May 17 , 2011 ; two days later , the network announced that the ninth season would serve as the series ' final season . Premiering on January 11 , 2012 , the series aired its 13 episodes uninterrupted . </P>
when did the last season of one tree hill air
when did the last season of one tree hill air
January 11 , 2012
January 11 , 2012