The Daman and Diu Portuguese Creole, Portuguese: Língua Crioula de Damãon e Dio & by its speakers as Língua da Casa meaning "home language", refers to the variety of Indo-Portuguese creole spoken in the Dadra and Nagar Haveli and Daman and Diu (Damaon territory), in the northern Konkan region of India.

Before the Indian annexation of the territory, the creole spoken by the Damanese natives underwent a profound decreolisation in the erstwhile Portuguese Goa and Damaon colony, a phenomenon whereby the Indo-Portuguese creole reconverged with European Portuguese.

It is a member of the larger family of Indo-Portuguese creoles, particularly close to the variety of Daman.

[1] There is a considerably vital oral tradition in this language, with songs regularly performed in Diu, elsewhere in India and among Indo-Portuguese communities abroad.

[1][3] The Portuguese heritage in Daman is more common and lively than in Goa and this helped to keep the language alive.