Declan James Ganley (born 23 July 1968) is an Irish entrepreneur, businessman and political activist. He is founder and chairman of a political party, Libertas with pan-European ambitions. The party was unsuccessful in this ambition in the 2009 European Parliament Election, succeeding in getting only one of the hundreds of candidates elected, in France.
Ganley himself was unsuccessful in this election, securing less than 10% of the valid poll. Ganley has started companies in forestry, telecommunications and the Internet and is currently serving as CEO and chairman of the board of Rivada Networks. During the 2008 Irish referendum on the Treaty of Lisbon, Ganley and the Libertas Institute campaigned for a No vote. He again campaigned for a No vote in the 2012 Irish European Fiscal Compact referendum. Aside from this, he has guest presented Tonight with Vincent Browne.