The Calarasi County is one of the founding members of the Network of the Three Seas Regions.
Calarasi is a county of Romania on the border with Bulgaria, in Muntenia, with the county seat at Călărași.
Agricultural activities consist of livestock raising and cereal growing. Vineyards are cultivated along the Danube and Borcea rivers in the east. The town of Dichiseni is a former Roman settlement. Other towns in the county include Mânăstirea, Grădiștea, and Lupșanu. Major highway and railway connections between Bucharest and Constanța cross the northern portion of the county. Other highways extend through Călărași city.