- Caged Bird
- Campaign Statement
- Canterbury Tales
- Carlyle at His Zenith
- Carmina
- Catch as Catch Can
- Catholic Digest
- Celebration of Awareness
- Character from My Fair Lady
- Character of a Happy Life
- Characteristics
- Chartism
- Chesapeake
- Childe Harold's Pilgrimage
- Christian Morals
- Christian Perfection
- Circle of the Seasons
- Civilization and Ethics
- Closing of American Mind
- Collected Poems
- Collected Works of Abraham Lincoln
- Collier and the Fuller, Fables
- Coming up for air
- Commentaries on the Laws of England
- Common Misquotations
- Common Sense
- Company Manners
- Compensation
- Complete Poems
- Condiments - the Tastemakers
- Conduct of Life
- Conference Report
- Confessions
- Confessions of Aleister Crowley
- Congressional Record
- Consuelo
- Contarini Fleming
- Conversation
- Conversation with Meyer von Waldeck, 11 Aug 1867
- Cooper Union Address
- Coriolanus
- Cours de philosophie moderne
- Crabbed Age and Youth
- Crack Up
- Critical and Miscellaneous Essays
- Critique of Practical Reason
- Culture, "The Conduct of Man"
- Cymbeline