Earl of St Germans, in the County of Cornwall, is a title in the Peerage of the United Kingdom that is held by the Eliot family. The title takes its name from the village of St Germans, Cornwall, and the family seat is Port Eliot. The earldom has the subsidiary title of Baron Eliot.

A writ in acceleration, commonly called a writ of acceleration, is a type of writ of summons that enabled the eldest son and heir apparent of a peer with more than one peerage to attend the British or Irish House of Lords, using one of his father's subsidiary titles, during his father's lifetime. This procedure could be used to bring younger men into the Lords and increase the number of capable members in a house that drew on a very small pool of talent.