Carcaliu is a commune located in the Northern Dobruja region of Tulcea County, Romania. The administrative area consists of a single village, which shares the same name as the commune.
The population of Carcaliu is characterized by its distinct ethnic composition. According to the 2011 census, the vast majority of inhabitants are Lipovans, accounting for 91% of the population, while Romanians make up 8.9% of the residents.