Events from the year 1745 in Sweden

• Monarch – Frederick I

• Catharina Ebba Horn becomes the official royal mistress of the King.^[1]
• Hortus Upsaliensis by Carl von Linné
• - Defense treaty between Sweden and Russia.

• February 21 - Olof Tempelman, architect (died 1816)
• March 5 - Christina Elisabeth Carowsky, painter (died 1797)
• May 5 - Carl August Ehrensvärd, naval officer, painter, author, and neo-classical architect (died 1800)
• August 19 - Johan Gottlieb Gahn, chemist and metallurgist who discovered manganese (died 1817)
• September 12 - Lovisa Meijerfeldt, countess and courtier, known as one of the "Three Graces" (died 1818)
• - Brita Horn, courtier (died 1791)

• - Hedvig Catharina Lillie, politically active salonniere (born 1695)
• - Sarah Derith, politically active noblewoman (born 1680)