The Irish House of Commons was the lower house of the Parliament of Ireland that existed from 1297 until the end of 1800. The upper house was the House of Lords. The membership of the House of Commons was directly elected, but on a highly restrictive franchise, similar to the unreformed House of Commons in contemporary Great Britain. Catholics were disqualified from sitting in the Irish parliament from 1691, even though they comprised the vast majority of the Irish population.

The House of Commons of Great Britain was the lower house of the Parliament of Great Britain between 1707 and 1801. In 1707, as a result of the Acts of Union of that year, it replaced the House of Commons of England and the third estate of the Parliament of Scotland, as one of the most significant changes brought about by the Union of the kingdoms of England and Scotland into the Kingdom of Great Britain.