| title | media type | | ISBN-13 | year of publication |
| Character and Opinion in the United States | Paperback | | 978-0-393-00389-5 | 1967 |
| Der letzte Puritaner. Erinnerungen in Form eines Romans | Gebunden | | 978-3-7175-8162-8 | 1990 |
| El egotismo en la filosofía alemana | Paperback | | 978-1-4947-1235-8 | 2013 |
| El ultimo puritano | Tapa blanda | | 978-84-350-0342-1 | 1981 |
| El ultimo puritano; tomo 1 | " | | 978-84-350-0343-8 | 1981 |
| El ultimo puritano; tomo 2 | " | | 978-84-350-0344-5 | 1981 |
| George Santayana's Marginalia, A Critical Selection: Book One, Abell-Lucretius | Hardcover | | 978-0-262-01629-2 | 2011 |
| George Santayana's Marginalia, A Critical Selection: Book Two, McCord-Zeller | " | | 978-0-262-01630-8 | 2011 |
| Interpretations of Poetry and Religion | Paperback | | 978-1-112-02600-3 | 2009 |
| Interpretations of Poetry and Religion | Hardcover | | 978-0-262-19286-6 | 1990 |
| Interpretations of Poetry and Religion | Paperback | | 978-0-262-51939-7 | 1990 |
| INTREPRETACIONES DE POESIA Y RELIGION | Tapa blanda | | 978-84-8367-058-3 | 2008 |
| L'ultimo puritano | Copertina flessibile | | 978-88-8490-501-7 | 2005 |
| Personas y lugares: Fragmentos de autobiografía | Tapa blanda | | 978-84-8164-536-1 | 2002 |
| Persons and Places: Critical Edition | Hardcover | | 978-0-262-19238-5 | 1987 |
| Persons And Places: Fragments of Autobiography | Paperback | | 978-0-262-69114-7 | 1988 |
| Platonismo y vida espiritual | Tapa blanda | | 978-84-8164-848-5 | 2006 |
| Scepticism and Animal Faith | Paperback | | 978-0-486-20236-5 | 1955 |
| Scetticismo e fede animale | Cartonato | | 978-88-425-9297-6 | 1971 |
| Skepticism And Animal Faith: Introduction To A System Of Philosophy | Paperback | | 978-1-162-79484-6 | 2010 |
| Soliloquios en Inglaterra y soliloquios posteriores | Tapa blanda | | 978-84-9879-075-7 | 2009 |
| The Genteel Tradition in American Philosophy and Character and Opinion in the United States | Paperback | | 978-0-300-11665-6 | 2009 |
| The Genteel Tradition: Nine Essays | " | | 978-0-8032-9251-2 | 1998 |
| The Last Puritan: A Memoir in the Form of a Novel | " | | 978-0-262-69178-9 | 1995 |
| The Last Puritan: A Memoir in the Form of a Novel | Hardcover | | 978-0-262-19328-3 | 1994 |
| The Letters of George Santayana, Book 1: -1909 | " | | 978-0-262-19457-0 | 2001 |
| The Letters of George Santayana, Book 2: 1910-1920 | " | | 978-0-262-19466-2 | 2001 |
| The Letters of George Santayana, Book Eight, 1948-1952: The Works of George Santayana, Volume V | " | | 978-0-262-19571-3 | 2008 |
| The Letters of George Santayana, Book Five, 1933-1936: The Works of George Santayana, Volume V | " | | 978-0-262-19490-7 | 2003 |
| The Letters of George Santayana, Book Four, 1928-1932: The Letters of George Santayana, Book 4: 1928-1932 | " | | 978-0-262-19479-2 | 2003 |
| The Letters of George Santayana, Book Seven, 1941-1947: The Works of George Santayana, Volume V | " | | 978-0-262-19556-0 | 2006 |
| The Letters of George Santayana, Book Six, 1937-1940: The Works of George Santayana, Volume V | " | | 978-0-262-19495-2 | 2004 |
| The Letters of George Santayana, Book Three, 1921-1927: The Letters of George Santayana, Book 3: 1921-1927 | " | | 978-0-262-19474-7 | 2002 |
| The Life of Reason : 1-5 | Paperback | | 978-1-4068-0040-1 | 2006 |
| The Life of Reason | " | | 978-1-57392-210-4 | 1998 |
| The Life of Reason or The Phases of Human Progress | Hardcover | | 978-1-116-05449-1 | 2009 |
| The Life of Reason; or, The Phases of Human Progress | Paperback | | 978-0-559-47806-2 | 2008 |
| The Life of Reason or The Phases of Human Progress: Introduction and Reason in Common Sense, Volume VII, Book One | Hardcover | | 978-0-262-01674-2 | 2011 |
| The Life of Reason or The Phases of Human Progress: Reason in Art, Volume VII, Book Four | " | | 978-0-262-02960-5 | 2015 |
| The Life of Reason or The Phases of Human Progress: Reason in Religion, Volume VII, Book Three | " | | 978-0-262-02832-5 | 2014 |
| The Life of Reason or The Phases of Human Progress: Reason in Society, Volume VII, Book Two | " | | 978-0-262-01959-0 | 2013 |
| The Life of Reason: Reason in Religion | Paperback | | 978-1-145-36232-1 | 2010 |
| The Life of Reason, Vol. 3: Reason in Religion | " | | 978-0-486-24253-8 | 1982 |
| The Sense Of Beauty | " | | 978-1-4662-0046-3 | 2011 |
| The Sense of Beauty: Being the Outline of Aesthetic Theory | " | | 978-0-486-20238-9 | 1955 |
| The Sense of Beauty: Critical Edition | Hardcover | | 978-0-262-19271-2 | 1988 |
| Three Philosophical Poets: Lucretius, Dante, Goethe | " | | 978-1-4351-0617-8 | 2009 |