Castelu

Castelu is a commune in Constanța County, Northern Dobruja, Romania.

The commune includes two villages:
 * Castelu (historical name: Chiostel, Köstel)
 * Nisipari (historical name: Caratai, Karatay, Karatai)

Castelu is located in the central part of the county, along the Danube–Black Sea Canal.

Demographics
At the 2011 census, Castelu had 3,453 Romanians (77.08%), 340 Roma (7.59%), 509 Turks (11.36%), 165 Tatars (3.68%), 6 Aromanians (0.13%), 7 others (0.16%).