The United States withdrew funding from the International Fund for Ireland in 2025 as part of a global foreign assistance review. The fund, established in 1986 by the Irish and British governments with backing from US President Ronald Reagan and Speaker Tip O'Neill, supported peacebuilding efforts across the island of Ireland.

In Northern Ireland, the fund financed the removal of peace walls and initiatives to deter youth recruitment by paramilitary groups. It also backed civic projects uniting nationalist, unionist, and cross-border communities. Over four decades, US administrations provided more than $500 million to the effort.

The Irish Department of Foreign Affairs noted the fund's focus on addressing segregation and fostering integration in Northern Ireland and adjacent southern border counties. This US contribution had served as the primary channel for American government aid to such peacebuilding activities.

The United Kingdom ceased its payments to the fund last year, citing fiscal constraints. It had pledged £4 million from 2021 to 2025 but withheld the final £1 million instalment.

The International Fund for Ireland emerged amid the Troubles, aiding the transition to the 1998 Belfast Agreement and ongoing reconciliation post-conflict.