His best-known work is perhaps his Den nyere Filosofis Historie (1894), translated into English from the German edition (1895) by B.E. Meyer as History of Modern Philosophy (2 vols., 1900), a work intended by him to supplement and correct that of Hans Brøchner, to whom it is dedicated. His Psychology, the Problems of Philosophy (1905) and Philosophy of Religion (1906) also have appeared in English.
Among Høffding's other writings, most of which have been translated into German, are: Den engelske Filosofi i vor Tid (1874); Etik (1876); Psychologi i Omrids paa Grundlag af Erfaring (ed. 1892); Psykologiske Undersøgelser (1889); Charles Darwin (1889); Kontinuiteten i Kants filosofiske Udviklingsgang (1893); Det psykologiske Grundlag for logiske Domme (1899); Rousseau und seine Philosophie (1901); Mindre Arbejder (1899).