The Adriatic campaign was a minor theatre of war during the Napoleonic Wars in which a succession of small British Royal Navy and Austrian Navy squadrons and independent cruisers harried the combined naval forces of the First French Empire, the Kingdom of Italy, the Illyrian Provinces and the Kingdom of Naples between 1807 and 1814 in the Adriatic Sea. Italy, Naples and Illyria were all controlled either directly or via proxy by the French Emperor Napoleon I, who had seized them at the Treaty of Pressburg in the aftermath of the War of the Third Coalition.

The Adriatic Sea is a body of water separating the Italian Peninsula from the Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto to the northwest and the Po Valley. The countries with coasts on the Adriatic are Albania, Bosnia and Herzegovina, Croatia, Italy, Montenegro, and Slovenia.