The Complete Peerage (full title: The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom Extant, Extinct, or Dormant); first edition by George Edward Cokayne, Clarenceux King of Arms; 2nd edition revised by Vicary Gibbs et al.) is a comprehensive work on the titled aristocracy of the British Isles.

(Herbert Arthur[1]) Doubleday, Duncan Warrand, Lord Howard de Walden, Geoffrey H. White and R. S. Lea.

[2] Volume thirteen was issued in 1940, not as part of the alphabetical sequence, but as a supplement covering creations and promotions within the peerage between 1900 and 1938.

The leading researcher on the project was Ethel Stokes and the five volumes from 1929 to 1949 acknowledge her major contribution.

Volumes 1–5 have the title Complete peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, extant, extinct or dormant, and volumes 6–13: The complete peerage; or, A history of the House of lords and all its members from the earliest times.