Does Ireland belong to British empire?

The Republic of Ireland is a sovereign country and is not part of the British Empire. Ireland was part of the United Kingdom of Great Britain and Ireland from 1801 to 1922. The Irish War of Independence was fought from 1919 to 1921, and resulted in the creation of the Irish Free State, which was a dominion within the British Empire. The Irish Free State became a fully independent republic in 1949.