Treaty of Fredrikshamn — September 1809 peace treaty between Russia and Sweden

1809 battle in India

1809 war during the War of the Fifth Coalition

1809 land treaty between the United States government and several Native American peoples

1809 riots in London

1809 minor naval engagement during the French Revolutionary Wars

1809 battle between a French Navy squadron of three frigates and a larger British squadron of ships of the line.

1809 minor battle of the Peninsular War

1809 small naval battle fought between the French frigate Niémen and several British frigates during the Napoleonic Wars

1809 naval battle during the Napoleonic Wars

Battle of Schwarze Lackenau