Călărași, the capital of Călărași County in the Muntenia region, is situated in south-east Romania, on the banks of the Danube's Borcea branch, at about 12 kilometres from the Bulgarian border and 125 kilometres from Bucharest. It is one of six Romanian county seats lying on the Danube river.

Călărași is a county (județ) of Romania on the border with Bulgaria, in Muntenia, with the county seat at Călărași.