Cupey is one of the 18 barrios of the municipality of San Juan, Puerto Rico located in the mountainous area of the municipality. It is the largest barrio or district in the San Juan and the third most populous with 32,833 inhabitants according to the 2020 US Census. The territorial land area of Cupey is 7.49 square miles (19.40 km2). It is bound by the municipality of Caguas to the South, by the municipality of Trujillo Alto to the East, by the barrios of Caimito and Monacillo to the West, and by the barrios of El Cinco and Sabana Llana Sur to the North. Between 1990 and 2000 Cupey had a 17.98% increase in population, more than any other barrio in San Juan.