By Category
The canon by form. Ingersoll wrote across more than a dozen genres, from the lecture circuit to the Senate floor to the courthouse bench. Each category lists every work in chronological order.
Lecture
21 works- 1860 Progress
- 1869 Humboldt
- 1870 Thomas Paine
- 1872 The Gods
- 1873 Individuality
- 1874 Heretics and Heresies
- 1877 About Farming in Illinois
- 1877 The Ghosts
- 1877 The Liberty of Man, Woman, and Child
- 1879 Some Mistakes of Moses
- 1880 What Must We Do To Be Saved?
- 1881 Some Reasons Why
- 1881 The Great Infidels
- 1884 Orthodoxy
- 1884 Which Way?
- 1885 Myth and Miracle
- 1896 Why I Am an Agnostic
- 1897 The Truth
- 1898 Superstition
- 1899 Jesus Christ
- 1899 The Devil
Essay
51 works- 1879 A Wooden God
- 1880 Prof. Van Buren Denslow's "Modern Thinkers"
- 1884 How to Edit a Liberal Paper
- 1885 Some Interrogation Points
- 1886 Life
- 1887 Fool Friends
- 1887 Inspiration
- 1887 Secularism
- 1887 The Libel Laws
- 1887 The Truth of History
- 1888 Art and Morality
- 1888 The Divided Household of Faith
- 1889 Huxley and Agnosticism
- 1889 Spirituality
- 1890 A Reply to Bishop Spalding
- 1890 Crimes Against Criminals
- 1890 Eight Hours Must Come
- 1890 God in the Constitution
- 1890 The Census Enumerator's Official Catechism
- 1890 The Improved Man
- 1890 The Jews
- 1890 The Three Philanthropists
- 1891 A Christmas Sermon
- 1891 A Few Reasons for Doubting the Inspiration of the Bible
- 1891 A Word About Education
- 1891 What I Want for Christmas
- 1892 An Essay on Christmas
- 1892 The Agnostic Christmas
- 1892 What Infidels Have Done
- 1893 Crumbling Creeds
- 1893 Effect of the World's Fair on the Human Race
- 1893 Our Schools
- 1893 Professor Briggs
- 1893 Sumter's Gun
- 1893 Vivisection
- 1894 About the Holy Bible
- 1894 Cruelty in the Elmira Reformatory
- 1894 Sabbath Superstition
- 1895 Fragments
- 1895 Science and Sentiment
- 1895 The Foundations of Faith
- 1896 A Young Man's Chances To-Day
- 1896 The Religious Belief of Abraham Lincoln
- 1897 Law's Delay
- 1897 Organized Charities
- 1897 The Bigotry of Colleges
- 1898 A Few Fragments on Expansion
- 1898 Our New Possessions
- 1898 Spain and the Spaniards
- 1899 A Look Backward and a Prophecy
- 1899 Political Morality
Discussion
11 works- 1877 A Vindication of Thomas Paine
- 1881 The Christian Religion
- 1882 Six Interviews on Talmage
- 1882 The Talmagian Catechism
- 1887 The Field–Ingersoll Discussion
- 1888 Rome or Reason
- 1888 The Ingersoll–Gladstone Controversy
- 1888 The Limitations of Toleration
- 1889 Divorce
- 1890 Reply to Archdeacon Farrar
- 1890 Reply to Dr. Lyman Abbott
Reply
13 works- 1877 My Reviewers Reviewed
- 1878 A Reply to the Cincinnati Gazette and Catholic Telegraph
- 1879 My Chicago Bible Class
- 1881 Interview on Chief Justice Comegys
- 1882 A Reply to Rev. Drs. Thomas and Lorimer
- 1883 The Brooklyn Divines
- 1883 To the Indianapolis Clergy
- 1886 Rev. Dr. Newton's Sermon on a New Religion
- 1892 Suicide of Judge Normile
- 1894 A Reply to Rev. John Hall and Warner Van Norden
- 1898 A Reply to the New York Clergy on Superstition
- 1898 A Reply to the Rev. Dr. Plumb
- 1898 Governor Rollins' Fast-Day Proclamation
Interviews
1 work- 1899 Interviews
Political
20 works- 1866 Address to the 86th Illinois Regiment
- 1867 An Address to the Colored People
- 1868 Speech at Indianapolis (1868)
- 1876 Bangor Speech
- 1876 Centennial Oration
- 1876 Chicago Speech
- 1876 Cooper Union Speech
- 1876 Indianapolis Speech (1876)
- 1876 Speech at Cincinnati
- 1876 The Plumed Knight
- 1877 Eight to Seven Address
- 1878 Hard Times and the Way Out
- 1880 Brooklyn Speech
- 1880 Suffrage Address
- 1880 Wall Street Speech
- 1882 Decoration Day Oration
- 1887 Reunion Address
- 1888 Decoration Day Address
- 1888 Ratification Speech
- 1896 The Chicago and New York Gold Speech
Legal
7 works- 1876 Address to the Jury in the Munn Trial
- 1882 Closing Address — First Star Route Trial
- 1882 Opening Address — Second Star Route Trial
- 1883 Address to the Jury in the Davis Will Case
- 1883 Closing Address — Second Star Route Trial
- 1887 Trial of C. B. Reynolds for Blasphemy
- 1899 Argument Before the Vice-Chancellor in the Russell Case
Tribute
29 works- 1878 Robert Burns
- 1879 A Tribute to Ebon C. Ingersoll
- 1879 A Tribute to the Rev. Alexander Clark
- 1882 At a Child's Grave
- 1884 A Tribute to George Jacob Holyoake
- 1884 A Tribute to John G. Mills
- 1885 A Tribute to Elizur Wright
- 1886 A Tribute to Mrs. Ida Whiting Knowles
- 1887 A Tribute to Henry Ward Beecher
- 1888 A Tribute to Courtlandt Palmer
- 1888 A Tribute to Mrs. Mary H. Fiske
- 1888 A Tribute to Richard H. Whiting
- 1888 A Tribute to Roscoe Conkling
- 1889 A Tribute to Horace Seaver
- 1890 Liberty in Literature
- 1891 A Tribute to Lawrence Barrett
- 1891 Shakespeare
- 1892 A Tribute to Philo D. Beckwith
- 1892 A Tribute to Walt Whitman
- 1892 Death of the Aged
- 1892 Ernest Renan
- 1892 Thomas Paine (Magazine Article)
- 1894 Abraham Lincoln
- 1894 Voltaire
- 1895 At the Grave of Benjamin W. Parker
- 1897 A Tribute to Thomas Corwin
- 1898 A Tribute to Anton Seidl
- 1898 A Tribute to Dr. Thomas Seton Robertson
- 1898 A Tribute to Isaac H. Bailey
Address
11 works- 1878 Convention of the National Liberal League
- 1879 The Circulation of Obscene Literature
- 1883 Address on the Civil Rights Act
- 1885 A Lay Sermon
- 1885 Convention of the American Secular Union
- 1888 Address to the Actors' Fund of America
- 1888 The Children of the Stage
- 1896 How to Reform Mankind
- 1897 A Thanksgiving Sermon
- 1898 Address to the Press Club
- 1899 What Is Religion?
After-Dinner
13 works- 1879 The Grant Banquet
- 1887 Thirteen Club Dinner
- 1889 Robson and Crane Dinner
- 1890 General Grant's Birthday Dinner
- 1890 Lotos Club Dinner — Twentieth Anniversary
- 1890 Manhattan Athletic Club Dinner
- 1890 The Police Captains' Dinner
- 1891 The Liederkranz Club Seidl-Stanton Banquet
- 1891 Unitarian Club Dinner
- 1892 The Frank B. Carpenter Dinner
- 1892 Western Society of the Army of the Potomac Banquet
- 1893 Lotos Club Dinner in Honor of Anton Seidl
- 1898 Lotos Club Dinner in Honor of Rear Admiral Schley