The Tavignano (French pronunciation: [taviɲano]; Corsican: Tavignanu) is a river on the island of Corsica, France.

The Tavignano is 88.9 km (55.2 mi) long. In antiquity the river was known as the Rhotanus or Ῥότανος. It crosses the communes of Aléria, Altiani, Antisanti, Casamaccioli, Corte, Erbajolo, Giuncaggio, Piedicorte-di-Gaggio, Poggio-di-Venaco, Riventosa, Santa-Lucia-di-Mercurio, Santo-Pietro-di-Venaco and Venaco.

The Tavignano rises below the 2,007 metres (6,585 ft) Capu a u Tozzu and flows to the east. It runs through Lac de Nino near its source. Part of the river's upper section flows through the Réserve biologique intégrale du Tavignano. It then flows through the town of Corte. From Corte it runs southeast to the Tyrrhenian Sea near Aléria, followed by the T50 road. it enters the sea between the Étang de Diane and the Étang del Sale. Its entire course is in the Haute-Corse département.

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  Lac de Nino near the source of the Tavignano
• 
  Tavignano upstream from Genoese bridge in Altiani
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  Genoese bridge in Altiani

Measurements of the river flow were taken at the Antisanti [Pont du Faïo] station from 1996 to 2021. The watershed above this station covers 573 square kilometres (221 sq mi). Annual precipitation was calculated as 509 millimetres (20.0 in). The average flow of water throughout the year was 9.23 cubic metres per second (326 cu ft/s).

Average flow (cubic meters per second) by month for the period 1996 to 2021

Month	Flow
Jan	12.50
Feb	11.60
Mar	13.70
Apr	14.10
May	12.10
Jun	5.260
Jul	1.800
Aug	0.907
Sep	1.860
Oct	4.880
Nov	15.50
Dec	16.70

The following streams (ruisseaux) are tributaries of the Tavignano, ordered by length: