Co'rdoba is a province of Argentina, located in the center of the country. Its capital, Co'rdoba, is the second largest city in the country. Rio Tercero Reservoir. Neighboring provinces are (clockwise from the north): Santiago del Estero, Santa Fe, Buenos Aires, La Pampa, San Luis, La Rioja and Catamarca. Together with Santa Fe and Entre Ri'os, the province is part of the economico-political association known as the Center Region.