Poblacht is the Irish word for "republic". It may refer to:

• An Phoblacht (English: The Republic), a newspaper published by Sinn Féin
• Poblacht na hÉireann (disambiguation), can be rendered in English Irish Republic or Republic of Ireland. It can refer to:
  • The revolutionary Irish Republic proclaimed in 1916 and 1919, also termed Saorstát Éireann
  • Poblacht na hÉireann, a newspaper first published in 1922 in Ireland by republican opponents of the Anglo-Irish Treaty
  • The Republic of Ireland, the legal description of the modern Irish state since 1949 (though not its official name)
• Proclamation of the Irish Republic (Irish: Forógra na Poblachta), a 1916 document declaring the independence of the Irish Republic from the United Kingdom
• Poblacht Chríostúil (English: Christian Republic), a small political party in Cork in the mid-1960s

• Names of the Irish state
• List of Irish exonyms