The Irish Guards (IG), part of the Guards Division, is a Foot Guards regiment of the British Army.

Along with the Royal Irish Regiment, it is one of the two Irish regiments remaining in the British Army. The Irish Guards recruit in Northern Ireland and the Irish neighbourhoods of major British cities. Restrictions in the Republic of Ireland's Defence Act make it illegal to induce, procure or persuade enlistment of any citizen of the Republic of Ireland into the military of another state, however people from that country do enlist in the regiment. Recently, the regiment has also seen several "non-traditional" recruits, notably Zimbabwean Christopher Muzvuru, who qualified as a piper before becoming one of the regiment's two fatal casualties in Iraq in 2003.

Historically, Irish Guards officers were often drawn from British public schools, particularly those with a Roman Catholic affiliation,^{[citation needed]} such as Ampleforth College, Downside School and Stonyhurst College. This is less common in recent times. In November 1942 Jean, Grand Duke of Luxembourg joined the British Army as a volunteer in Irish Guards.