Sir Henry Mainwaring (1587–1653), was an English lawyer, soldier, writer, seaman and politician who sat in the House of Commons from 1621 to 1622. He was for a time a pirate based in Newfoundland and then a naval officer with the Royal Navy. He supported the Royalist cause in the English Civil War.
- Occupation
- sailor, writer, pirate, politician
- Position held
- Member of Parliament in the Parliament of England, Gentleman of the Bedchamber, flag captain, Member of the 1621-22 Parliament
- Citizenship
- Kingdom of England
- Born
- 1587
- Died