The title "Baron of Dungannon" is a hereditary peerage in the Peerage of Ireland. It was created in 1620 for Sir John O'Neill, a member of the prominent O'Neill family, which played a significant role in Irish history. The title is associated with the town of Dungannon in County Tyrone, Northern Ireland. The barony has been passed down through generations, often linked to the political and social changes in Ireland. The current holder of the title is a descendant of the original baron, maintaining the historical legacy of the O'Neill family in the region.