The March (or margraviate) of Tuscany or Tuscia is a frontier march in central Italy, bordering the Papal States to the south and east, the Ligurian Sea to the west, and the rest of the Kingdom of Italy to the north.

It is a Carolingian creation, a successor of the Lombard Duchy of Tuscia.

The march itself comprises a collection of counties, largely in the valley of the Arno, centered around the County of Lucca, which is sometimes called a duchy.