This is a list of the present and extant Barons (Lords of Parliament, in Scottish terms) in the Peerages of England, Scotland, Great Britain, Ireland, and the United Kingdom. Note that it does not include those extant baronies which have become merged (either through marriage or elevation) with higher peerage dignities and are today only seen as subsidiary titles. For a more complete list, which adds these "hidden" baronies as well as extinct, dormant, abeyant, and forfeit ones, see List of Baronies.

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This page includes all life barons, including the Law Lords created under the Appellate Jurisdiction Act 1876. However hereditary peers with the rank of viscount or higher holding also a life peerage are not included.

The general order of precedence among barons is:

1. Barons of England
2. Lords of Parliament of Scotland
3. Barons of Great Britain
4. Barons of Ireland
5. Barons of the United Kingdom

However barons of Ireland created after the Union of 1801 yield precedence to earlier created barons of the United Kingdom.^[1] They are listed in italics, in their place in the order of precedence. Life peers take precedence with other barons of the United Kingdom; they are listed separately because the only hereditary baronies created since 1965 have been subsidiary titles: Prince Andrew, Duke of York, who holds the subsidiary title of Baron Killyleagh, Prince William, Duke of Cambridge, who holds the subsidiary title of Baron Carrickfergus, and Prince Harry, Duke of Sussex, who holds the subsidiary title of Baron Kilkeel.