1845 in philosophy

• Alexander von Humboldt, Cosmos: A Sketch of the Physical Description of the Universe (1845)
• William Whewell, The Elements Of Morality, Including Polity (1845)
• Domingo Faustino Sarmiento, Facundo (1845)
• Søren Kierkegaard, Stages on Life's Way (1845)

• March 3 - Georg Cantor (died 1918)

• May 12 - August Wilhelm Schlegel (born 1767)
• February 22 - Sydney Smith (born 1771)

• Hay, Katia D. "August Wilhelm von Schlegel". In Zalta, Edward N. (ed.). Stanford Encyclopedia of Philosophy.