Lieutenant General Charles O'Hara, 1st Baron Tyrawley (died 9 June 1724) was an Irish soldier known for his service with the British Army.

Born in Ireland in the mid-seventeenth century, his exact origins are unclear, with some contemporaries claiming that he had once been a highwayman.

He developed a connection with the powerful Butler family of County Tipperary, who frequently governed Ireland on the Crown's behalf.

[2] In 1703, during the War of Spanish Succession, he went to Cadiz; he distinguished himself at the Battle of Vigo Bay but was arrested for looting on return to England.

[2] Having been acquitted, in 1706, he became Second-in-Command in Spain and prevented a French attack on Guadalajara, earning an Irish Barony as a reward.