Daniel Florence O'Leary (Irish: Dónall Fínín Ó Laoghaire; 14 February 1801 – 24 February 1854) was a military general and aide-de-camp under Simón Bolívar.

[1] Unlike many of the Irish who fought for Simon Bolívar in his many campaigns to win South American independence, O'Leary had not served in the Napoleonic Wars.

After Bolívar's death in 1830, O'Leary disobeyed orders to burn the general's personal documents.

He spent much of the rest of his life organizing them, along with writing his own very extensive memoirs (spanning thirty-four volumes) of his time fighting in the revolutionary wars with Bolívar.

A bust and plaque honouring O'Leary were presented by the Venezuelan Government to the people of Cork and unveiled on 12 May 2010 by the Venezuelan Ambassador to Ireland, Samuel Moncada.