Juliaca is the capital of San Román Province in the Puno Region of southeastern Peru. It is the region's largest city with a population of 276,110 inhabitants (2017). On the Altiplano, Juliaca is 3825 m above sea level, is located on the Collao Plateau and is northwest of Lake Titicaca (45 km). It is the largest trade center in the Puno region.