The term Invasion of Ireland can refer to several attempted invasions of the island of Ireland including:

• Lebor Gabála Érenn, The Book of Invasions, describing mythological conquests of Ireland, anonymously compiled in the late 11th century.
• Viking invasions of Ireland (8th–11th century).
• Norman invasion of Ireland led by the Earl of Pembroke, supported by King of Leinster, Dermot McMurrough (12th century).
• Scottish invasion by Edward Bruce (1315–18).
• English invasion of Ireland (1399), invasion by Richard II following which he was deposed by Henry IV
• Tudor conquest of Ireland, invasion begun by Henry VIII of England after he was declared King of Ireland (16th century).
• Spanish Landing in Ireland by Habsburg Spain During the Nine Years' War (October 1601)
• Cromwellian conquest of Ireland, invasion of Ireland by English Parliamentarians during the Wars of the Three Kingdoms (1649–53).
• The Expédition d'Irlande by the French First Republic (December 1796).
• The French invasion of Ireland during the Irish Rebellion of 1798.
• Operation Green, planned but ultimately postponed and then cancelled invasion by Nazi Germany during World War II.