Patrick Joseph Leahy (born March 31, 1940) is an American politician and attorney who represented Vermont in the United States Senate from 1975 to 2023.

William Leahy was an Anglican priest in Ireland during the 19th century.

William Daniel Leahy (6 May 1875 – 20 July 1959) was an American naval officer.

(born October 16, 1986) an American television host and former sports reporter.

Sir Terence Patrick Leahy (born 28 February 1956) is a British businessman, previously the CEO of Tesco, the largest British retailer and the third-largest retailer in the world measured by revenues.

William P. Leahy (born 1948) is an American Jesuit academic who served as the 25th president of Boston College, a post he had held since 1996, making him the longest serving president in the school's history.

(born 16 April 1999) an Australian road and track cyclist, who last rode for UCI Continental team .

The Leahy Laws or Leahy amendments are U.S. human rights laws that prohibit the U.S. Department of State and Department of Defense from providing military assistance to foreign security force units that violate human rights with impunity.

Michael Leahy was a child who died by drowning in 1826 in County Kerry, Ireland.