Italo-Dalmatian can be split into:
- Italo-Romance, which includes most central and southern Italian languages.
- Dalmatian Romance, which includes Dalmatian and Istriot.
The generally accepted four branches of the Romance languages are Western Romance, Italo-Dalmatian, Sardinian and Eastern Romance. But there are other ways that the languages of Italo-Dalmatian can be classified in these branches:
- Italo-Dalmatian is sometimes included in Eastern Romance (which includes Romanian), leading to: Western, Sardinian, and Eastern branches.
- Italo-Dalmatian is sometimes included in Western Romance (which includes the Gallic and Iberian languages) as Italo-Western, leading to: Italo-Western, Sardinian, and Eastern branches.
- Italo-Romance is sometimes included in Italo-Western, with Dalmatian Romance included in Eastern Romance, leading to: Italo-Western, Sardinian, and Eastern branches.
- Corsican (from Italo-Dalmatian) and Sardinian are sometimes included together as Southern Romance, or Island Romance, leading to: Western, Italo-Dalmatian, Southern, and Eastern branches.
- The Dalmatian language was spoken in the Dalmatia region of Croatia. It became extinct in the 19th century.
- The Istriot language is a moribund variety spoken in the southwestern part of Istrian peninsula in Croatia.
The Venetian language is sometimes added to Italo-Dalmatian when excluded from Gallo-Italic, and then usually grouped with Istriot. However, Venetian is not grouped into the Italo-Dalmatian languages by Ethnologue and Glottolog, unlike Istriot.
- Tuscan–Corsican: group of dialects spoken in the Italian region of Tuscany, and the French island of Corsica.
- Northern Tuscan dialects:
- Southern Tuscan dialects:
- Dialects of Aretino-Chianaiolo, Senese, Grossetano.
- Corsican, spoken on Corsica, is thought to be descended from Tuscan.