| A Few Fragments on Expansion On American territorial expansion. | Essay | 1898 |
| A Tribute to Anton Seidl Memorial tribute to the conductor. | Tribute | 1898 |
| A Tribute to Courtlandt Palmer Memorial tribute to the founder of the Nineteenth Century Club. | Tribute | 1888 |
| A Tribute to Dr. Thomas Seton Robertson Memorial tribute. | Tribute | 1898 |
| A Tribute to Ebon C. Ingersoll Washington, D.C., May 31, 1879. | Tribute | 1879 |
| A Tribute to Elizur Wright Memorial tribute. | Tribute | 1885 |
| A Tribute to George Jacob Holyoake English freethinker and coiner of the word "secularism." | Tribute | 1884 |
| A Tribute to Henry Ward Beecher Memorial tribute to the great American preacher. | Tribute | 1887 |
| A Tribute to Horace Seaver Memorial tribute to the editor of the Boston Investigator. | Tribute | 1889 |
| A Tribute to Isaac H. Bailey Memorial tribute. | Tribute | 1898 |
| A Tribute to John G. Mills Grave-side tribute. | Tribute | 1884 |
| A Tribute to Lawrence Barrett Memorial tribute to the actor. | Tribute | 1891 |
| A Tribute to Mrs. Ida Whiting Knowles Memorial tribute. | Tribute | 1886 |
| A Tribute to Mrs. Mary H. Fiske Memorial tribute. | Tribute | 1888 |
| A Tribute to Philo D. Beckwith Memorial tribute. | Tribute | 1892 |
| A Tribute to Richard H. Whiting Memorial tribute. | Tribute | 1888 |
| A Tribute to Roscoe Conkling Memorial address to the New York legislature, May 9, 1888. | Tribute | 1888 |
| A Tribute to the Rev. Alexander Clark Grave-side tribute. | Tribute | 1879 |
| A Tribute to Thomas Corwin Memorial tribute. | Tribute | 1897 |
| A Tribute to Walt Whitman Grave-side address at Whitman's burial, Camden, N.J., March 30, 1892. | Tribute | 1892 |
| Address to the Actors' Fund of America New York, June 5, 1888. | Address | 1888 |
| Address to the Press Club New Orleans, February 1, 1898. | Address | 1898 |
| At a Child's Grave Washington, D.C., January 8, 1882. | Tribute | 1882 |
| At the Grave of Benjamin W. Parker Grave-side tribute. | Tribute | 1895 |
| Convention of the American Secular Union Albany, N.Y., September 13, 1885 — presidential address. | Address | 1885 |
| Convention of the National Liberal League Cincinnati, September 14, 1878. | Address | 1878 |
| Death of the Aged Letter of condolence. | Tribute | 1892 |
| Effect of the World's Fair on the Human Race On the 1893 Chicago Columbian Exposition. | Essay | 1893 |
| Fragments Short letters, fragments, and occasional pieces. | Essay | 1895 |
| General Grant's Birthday Dinner Tribute to Ulysses S. Grant. | After-Dinner | 1890 |
| Jesus Christ An unfinished lecture, begun a few days before Ingersoll's death. | Lecture | 1899 |
| Life New York Dramatic Mirror, December 18, 1886. | Essay | 1886 |
| Lotos Club Dinner — Twentieth Anniversary New York literary and theatrical club. | After-Dinner | 1890 |
| Lotos Club Dinner in Honor of Anton Seidl After-dinner tribute to the conductor. | After-Dinner | 1893 |
| Lotos Club Dinner in Honor of Rear Admiral Schley After-dinner tribute to the hero of Santiago. | After-Dinner | 1898 |
| Manhattan Athletic Club Dinner After-dinner speech. | After-Dinner | 1890 |
| Organized Charities Essay. | Essay | 1897 |
| Our New Possessions On Cuba, the Philippines, and the territorial gains of 1898. | Essay | 1898 |
| Prof. Van Buren Denslow's "Modern Thinkers" Introduction to Denslow's biographical study of Swedenborg, Adam Smith, Bentham, Paine, Fourier, Comte, Haeckel, and Spencer. | Essay | 1880 |
| Professor Briggs On the Presbyterian heresy trial of Charles A. Briggs. | Essay | 1893 |
| Robson and Crane Dinner In honor of the actors Stuart Robson and William H. Crane. | After-Dinner | 1889 |
| Sabbath Superstition On the Sunday laws. | Essay | 1894 |
| Spain and the Spaniards On the Spanish-American War. | Essay | 1898 |
| The Children of the Stage On the stage and its people. | Address | 1888 |
| The Circulation of Obscene Literature Defense in the Bennett-Comstock prosecution. | Address | 1879 |
| The Frank B. Carpenter Dinner Tribute to the painter Frank B. Carpenter. | After-Dinner | 1892 |
| The Grant Banquet Twelfth toast, Chicago, November 13, 1879. | After-Dinner | 1879 |
| The Liederkranz Club Seidl-Stanton Banquet In honor of Anton Seidl and Theodore Stanton. | After-Dinner | 1891 |
| The Police Captains' Dinner After-dinner speech. | After-Dinner | 1890 |
| The Religious Belief of Abraham Lincoln Letter to Mr. Seip, New York, May 28, 1896. | Essay | 1896 |
| Thirteen Club Dinner On the superstitions of public men. | After-Dinner | 1887 |
| Unitarian Club Dinner After-dinner address. | After-Dinner | 1891 |
| Western Society of the Army of the Potomac Banquet Civil War veterans reunion. | After-Dinner | 1892 |