High Quality Content by WIKIPEDIA articles! Río Tercero is a city located on the Tercero River in the Tercero Arriba Department of Córdoba Province (Argentina). Córdoba is a province of Argentina, located in the center of the country. Its capital, Córdoba, is the second largest city in the country. 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 Ríos, the province is part of the economico-political association known as the Center Region.