The Principal Secretary of State, or Principal Secretary of the Council, was a government office in the Kingdom of Ireland. It was abolished in 1801 when Ireland became part of the United Kingdom of Great Britain and Ireland under the Acts of Union 1800. In the Republic of Ireland the Union with Ireland Act 1800 (that passed in Great Britain) was not finally repealed until the passing by the Oireachtas of the Statute Law Revision Act 1983. The Act of Union (Ireland) 1800 (that passed in Ireland) was repealed in 1962.