|Département du Tanaro|
|department of French First Republic and First French Empire|
|11 September 1802|
|6 June 1805|
|Political subdivisions||3 arrondissements|
Tanaro [ta.na.ʁo] was a short-lived department of the French Consulate and of the First French Empire in present-day Italy. It was named after the river Tanaro. It was formed in 1802, when the Subalpine Republic (formerly the mainland portion of the Kingdom of Sardinia) was directly annexed to France. Its capital was Asti.
- Asti, cantons: Asti, Canelli, Castelnuovo, Cocconato, Costigliole, Mombercelli, Montafia, Montechiaro, Portacomaro, Rocca d'Arazzo, San Damiano, Tigliole and Villanova d'Asti.
- Acqui, cantons: Acqui, Castelletto d'Orba, Dego, Incisa, Nizza Monferrato, Santo Stefano Belbo, Spigno and Visone.
- Alba, cantons: Alba, Bossolasco, Bra, Canale, Cortemilia, Guarene, La Morra and Sommariva del Bosco.
Its population in 1805 was 310,459.