Henry Bruen PC, DL (16 June 1828 – 8 March 1912) was an Irish Conservative Party politician. He was Member of Parliament (MP) for Carlow County from 1857 to 1880, taking his seat in the House of Commons of what was then the United Kingdom of Great Britain and Ireland. He was the third (and last) in a line of to represent County Carlow.
Bruen was elected unopposed at 1857 general election, taking a seat previously held by his father Henry Bruen (1789–1852). He was returned unopposed at the next the general elections, but at the 1880 general election, Carlow's two Conservative MPs were both defeated by Home Rule League candidates. On 26 April 1880, shortly after his electoral defeat, he was sworn as a member of the Privy Council of Ireland.
In addition to his Parliamentary seat, Bruen held a number of other appointments. He was High Sheriff of Carlow in 1855, and High Sheriff of Wexford in 1883, and was at some unspecified time a Justice of the Peace in both counties. He was also a Deputy Lieutenant (D.L.) of County Carlow.
Bruen was the youngest child, and only son, of Henry Bruen (1789–1852) and his wife Anne Wandesforde Kavanagh (died 1850). His father had been an MP for Carlow County for most of the period from 1812 until death; his grandfather Henry Bruen (1741–1795) had been a member of the pre-Act of Union Parliament of Ireland; and his uncle Francis Bruen was an MP for Carlow Borough in the 1830s.