Bruen is a surname. People with this surname include:
Francis Bruen (died 1867), Member of the UK Parliament for Carlow Borough 1835–1837, 1839Henry Bruen:Henry Bruen (1741–1795), Irish politician, Member of the Parliament of Ireland for Jamestown 1783–1790 and Carlow County 1790–1795Colonel Henry Bruen (1789–1852), Irish politician, Member of the UK Parliament for County Carlow 1812–1831, 1835–1837, 1840–1852his son Henry Bruen (1828–1912), MP for County Carlow 1857–1880Ken Bruen (born 1951), Irish writer