Biography.com: Cudworth, Ralph: Very short biographical article.
Catalog of the Scientific Community: Cudworth, Ralph: Basic biographical facts, compiled by the Galileo Project.
Cudworth : The True Intellectual System of the Universe: A background paragraph and two images of this book by the philosopher, printed in 1678.
FOLDOC: Cudworth Ralph: Very brief entry from this philosophical database, with abundant links to related topics.
Ralph Cudworth: Article from the Internet Encyclopedia of Philosophy, outlining the intellectual career of this 17th-century English Platonist.
Ralph Cudworth: Brief article noting Cudworth's impact on the New England Transcendentalists.
Ralph Cudworth: Wikipedia article on this English philosopher and theologian. Contains material from the 1911 Encyclopaedia Britannica.