Sir Frederick Flood, 1st Baronet, KC (1741–1 February 1824), was an Irish lawyer and politician. He was a Member of the Irish Parliament from 1776 until 1801, and then later a Member of the Parliament from 1801 until 1818. Although Flood opposed the Act of Union 1801 that merged the Kingdoms of Ireland and Great Britain, he sat as a member of the united Parliament in London until his retirement.