The Kingdom of Italy may refer to three kingdoms:
- Napoleonic Kingdom of Italy or Italy - Venice: two nations founded by Napoleon Bonaparte in 1805.
- Kingdom of Sardinia: ruled Sardinia and Piedmont from 1324 to 1861, ruled Italy from 1861 to 1946.
- Italian Empire: ruled Italy from 1861 to 1946, latter stage of the Kingdom of Sardinia.