Events from the year 1803 in Sweden

• Monarch – Gustav IV Adolf

• - The land reform Enskiftet is enforced in all Scania.
• - The Yellow Rose (society) is exposed and banned by the monarch, leading to the end of all secret masonic lodges at the royal court.^[1]

• 8 June - Amalia Assur, first female dentist (died 1889)
• 16 May – Amelie von Strussenfelt, writer (died 1847)
• 25 November – Sofia Ahlbom, artist (died 1868)
• 26 November – Wilhelmina Stålberg, writer (died 1886)
• – Evelina Stading, painter (died 1872)
• – Isak Albert Berg, singer, composer (died 1886)

• 1 February – Anders Chydenius, leading classical liberal of Nordic history (born 1729)
• 12 December - Prince Frederick Adolf of Sweden, prince (born 1750)
• 27 August - Peter Gustaf Tengmalm, naturalist (born 1754)
• - Erika Liebman, poet and scholar (born 1738)