The French expedition to Sardinia was a short military campaign fought in 1793 in the Mediterranean Sea in the first year of the War of the First Coalition, during the French Revolutionary Wars. The operation was the first offensive by the new French Republic in the Mediterranean during the conflict, and was directed at the island of Sardinia, part of the Kingdom of Sardinia. Sardinia was neutral at the time, but immediately joined the anti-French coalition. The operation was a failure, with attacks directed at Cagliari in the south and La Maddalena in the north both ending in defeat.

The Kingdom of Sardinia is a term used to denote the Savoyard state from 1720 until 1861, which united the island of Sardinia with the mainland possessions of the House of Savoy. Before 1847, only the island of Sardinia proper was part of the Kingdom of Sardinia, while the other mainland possessions were held by the Savoys in their own right, hence forming a composite monarchy and a personal union which was formally referred to as the "States of His Majesty the King of Sardinia". This situation was changed by the Perfect Fusion act of 1847, which created a unitary kingdom. Due to the fact that Piedmont was the seat of power and prominent part of the entity, the state is also referred to as Sardinia-Piedmont or Piedmont-Sardinia and sometimes erroneously as the Kingdom of Piedmont.