Cupey is the largest barrio in the municipality of San Juan, and the third most populous with 36,659 inhabitants according to Census 2000. 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.