Henry FitzGerald, 12th Earl of Kildare (1562 – 30 September 1597) was an Irish peer and soldier.
Nicknamed Henry "na Tuagh", or Henry "of the Battleaxes", he fought against the Spanish invaders in Ireland in 1588. In 1597 he helped quell the Earl of Tyrone's uprising in Ulster, where he was mortally wounded. Wounded in a skirmish on the Blackwater in July 1597, he was brought to Drogheda where he died of his wounds 30 September 1597.
Kildare married Frances, daughter of Charles Howard, 1st Earl of Nottingham and Katherine Carey, in 1589. They had no sons and Kildare was succeeded by his brother William FitzGerald, 13th Earl of Kildare. He had at least two surviving daughters:
- Bridget, (c. 1590 – died between 1661 and 1683), married firstly Rory O'Donnell, 1st Earl of Tyrconnell, and secondly Nicholas Barnewall, 1st Viscount Barnewall and had children from both marriages.
- Elizabeth,  who married Luke Plunkett, 1st Earl of Fingall, when he was Baron Killeen. She died in London in 1611, whereas her widowed husband married three more times and became Earl of Fingall in 1628.
- Lundy 2015, p. 1265 § 12649 cites Mosley 2003, p. 2299
- Webb, Alfred. A Compendium of Irish Biography, Dublin, M.H. Gill & Son, 1878
- Lundy 2015, p. 1265 § 12649 cites Cokayne 2000, p. 428
- Lundy, Darryl (29 June 2015), Henry FitzGerald, 2nd/12th Earl of Kildare, thepeerage.com, p. 1265 § 12649 cites:
- Cokayne, G.E; et al., eds. (2000), The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, I (Reprint in 6 volumes ed.), Gloucester, U.K.: Alan Sutton Publishing, p. 428
- Mosley, Charles, ed. (2003), Burke's Peerage, Baronetage & Knightage, 2 (107th in 3 volumes ed.), Wilmington, Delaware: Burke's Peerage, p. 2299
|Peerage of Ireland|
| Earl of Kildare