Killian Cosgrove (born 25 April 1987) is an Irish hurler who played as a full-forward for the Westmeath senior team.
Cosgrove went on to play a key role for Westmeath, and won one Christy Ring Cup medal in 2005.
At club level Cosgrove plays with Lough Lene Gaels.
Cosgrove was forced to retire due to injury after the 2009 Christy Ring Cup.
His father, Michael, also played hurling with Westmeath and later served as manager of the team.