Private Seán Rooney will be honoured at the United Nations Headquarters in New York today.
The Irish Ambassador to the UN will receive a medal on behalf of the family of the Irish peacekeeper.
23-year-old Private Rooney was killed while on duty in Lebanon last December.
The ceremony forms part of a series of events to mark the 75th anniversary of UN peacekeeping.
Medals will be awarded posthumously to 103 military, police, and civilian peacekeepers, who lost their lives serving under the UN flag last year.
