Declan O'Sullivan (born 18 December 1983) is an Irish former sportsperson.
He last played Gaelic football with his local club Dromid Pearses, his divisional side South Kerry and was a member of the Kerry senior inter-county team since from 2003 until his retirement in 2014.
O'Sullivan captained Kerry to back-to-back All-Ireland titles in 2006 and 2007.
He is regarded as one of the all-time great centre forwards.
Since retirement, O'Sullivan has taken the role of Kerry Minor selector for the 2015 season.
As part of Jack O Connor's backroom team, in O'Sullivan's first season as selector, they captured the All-Ireland title.
While O'Connor completed the historic back-to-back All-Ireland titles.
O'Sullivan joined Jack O'Connor as selector for the Kerry under-21 football team for the 2016 Championship season.