| 2026-01-20 | American author whose life span closely coincided with Halley's comet visits |
| 2025-04-04 | "Life on the Mississippi" memoirist |
| 2024-07-01 | Mark of literary distinction |
| 2023-12-31 | "The father of American literature," per Faulkner |
| 2022-10-20 | Eponym for an annual prize for American humor |
| 2015-05-27 | Who wrote "When in doubt, tell the truth" |
| 2013-09-04 | "Is Shakespeare Dead?" writer |
| 2013-02-03 | Who said "Familiarity breeds contempt - and children" |
| 2012-07-18 | Author depicted next to a steamboat on a 2011 stamp |
| 2008-02-11 | "Huckleberry Finn" author |
| 2006-01-31 | Wit who wrote "When in doubt, tell the truth" |
| 2003-05-12 | "Tom Sawyer" author |
| 2001-05-31 | "What Is Man?" essayist |
| 2000-07-19 | Aunt Polly's creator |
| 2000-02-09 | Injun Joe creator |
| 1999-01-03 | The Finn man |
| 1995-08-13 | "Pudd'nhead Wilson" writer |
| 1994-06-15 | "Following the Equator" author |
| 1993-12-24 | "Roughing It" writer |