Thomas Meagher

• Thomas Meagher (merchant) Irish emigrant to Newfoundland, merchant and ship-owner
• Thomas Meagher (MP), Irish businessman and politician, Mayor of Waterford and MP for Waterford 1847–57
• Thomas Francis Meagher, leader of the Young Irelanders in the 1848 Rebellion, acting Governor of the Montana Territory
• Thomas William Meagher Australian medical practitioner, Lord Mayor of Perth, Western Australia