Deerfield Residence, Ambassador residence in Phoenix Park, Dublin, Ireland

Deerfield Residence is an 18th-century Georgian house in Phoenix Park, Dublin, standing on 62 acres of private grounds opposite Áras an Uachtaráin. Its lower ground floor holds a ballroom, reception and dining room, library, office, kitchens and laundry; the upper floor has six suites plus a sitting room. Three cottages and a security building at the front gate share the grounds, which also include a seasonal American football field, basketball court and tennis court.

John Blaquiere, 1st Baron de Blaquiere, built the house as Chief Secretary's Lodge in the late 18th century; it served as the Dublin residence of successive Chief Secretaries until the post was abolished in 1922. In 1927 it was leased for ten years to the United States government as a combined ambassador's residence and embassy. A 1938 plan to make it the President of Ireland's residence was dropped after the Office of Public Works reported it structurally unsound, and the embassy later moved to Ballsbridge, leaving the lodge as the ambassador's residence.

The grounds were named Deerfield in the 1970s by the wife of a U.S. ambassador, after the deer that roam the parkland around the house. The residence has hosted John F. Kennedy, Richard Nixon, Bill Clinton and Joe Biden on their Irish visits; Ronald Reagan, George W. Bush and Barack Obama stayed elsewhere for security reasons.

The 62-acre grounds are private and operated by the U.S. Department of State, so the lawns, orchards and gardens are not open to the public; views of the house are from the Phoenix Park roads around it. The Special Detective Unit of the Garda Síochána guards the property from outside, and the entrance is at a security building by the front gate.

The grounds were named Deerfield in the 1970s by the wife of a U.S. ambassador, after the deer that roam the parkland around the house. The estate also holds three cottages, a security building at the front gate, and a seasonal American football field.