Vice-Admiral Sir Peter Warren, KB (10 March 1703 – 29 July 1752) was a Royal Navy officer and politician who sat in the British House of Commons representing the constituency of Westminster from 1747 to 1752.

Warren is best known for his career in the British navy, which he served in for thirty-six years and participated in numerous naval engagements, including most notably the capture of the French fortress of Louisbourg in 1745.

[2][3] In 1716, Warren followed in the footsteps of his brother Oliver and enlisted in the Royal Navy, serving on board the Rye at the rank of ordinary seaman under the patronage of his maternal uncle Matthew Aylmer.

[2] On 23 July, Warren was promoted to the rank of lieutenant while serving on board the Guernsey off the Liberian coast to replace a fellow naval officer.

The Admiralty accepted his suggestion in August of that year, and appointed him as the commander of the new squadron, which operated off the Leeward Islands and distinguished itself by capturing numerous French prizes during the War of the Austrian Succession.

[7] He was also appointed as the first governor of Cape Breton Island, though Warren pleaded with to the Admiralty to find a replacement as he was attempting to secure the governorship of New York from George Clinton.

However, the Admiralty noted they could not undertake the scheme and have enough ships to maintain the ongoing British blockade of French ports; instead, they ordered Warren to lead an eight-ship squadron to reinforce the occupation of Louisbourg.

[2][8] In May 1747, Warren was part of the British fleet which encountered a French force under the command of the Marquis de la Jonquière off Cape Finisterre and defeated it.

[2] In addition to naval affairs, Warren was also active in attending parliamentary committees, chairing several and delivering numerous proposed bills to the House of Lords himself.

He also advocated for a stronger Royal Navy and alliances with other European nations to counter French ambitions, in addition to involving himself on discussions concerning British currency and overseas trade, fishing and boundary issues in Britain's colonial empire.

He spent his fortune on purchasing large amounts of land in both Britain and the Thirteen Colonies and running a moneylending business which operated in England, Ireland and North America.

[13] In 1732, he invited his nephew William Johnson to manage his estates in the Mohawk Valley region, charging him with clearing the land and settling European tenant labourers, in addition to establishing trading relationships with local indigenous American tribes.

[21] In addition, Warren's involvement in the capture of Louisbourg has been credited as helping to inspire significant interest among the British public of North American affairs for the first time.