Tabatinga, originally Forte de São Francisco Xavier de Tabatinga, is a municipality in the Três Fronteiras area of Western Amazonas. It is in the Brazilian state of Amazonas. Its population was 67,182 and its area is 3,225 km2. Together with the neighbouring Colombian city of Leticia and the Peruvian city of Santa Rosa de Yavari, the urban area has more than 100,000 residents spread along the Amazon River.