特雷西纳是巴西的城镇，位于该国东部，也是皮奥伊州的首府，面积1,392平方公里，海拔高度72米，受热带气候影响，每年平均降雨量约1,500毫米，2011年人口822,363。

• （葡萄牙文） 官方网站
• （葡萄牙文） （英文） Panoramic Teresina - Tourist information
• （英文） Visit Piauí - Tourist information

Teresina is the capital and most populous municipality in the Brazilian state of Piauí. Being located in North-central Piauí 366 km from the coast, it is the only capital in the Brazilian Northeast that is not located on the shores of the Atlantic Ocean. With 814,439 inhabitants, Teresina is the 19th largest city in Brazil, and the 15th largest state capital in the country. Together with Timon in the nearby state of Maranhão, it forms a conurbation with a population of about 953,172 inhabitants; the entire metropolitan region of Teresina has over 1,135,920 inhabitants. The only natural barrier that separates Teresina from Timon is the Parnaíba river, one of the largest in the Northeast. Teresina is the second capital with the best quality of life in the North-Northeast according to FIRJAN. According to IPEA it is the third safest capital of Brazil (second only to Natal, and Palmas).