According to the United States Census Bureau, the city has a total area of 37.0 square miles (96 km2). 36.8 square miles (95 km2) of it is land and 0.2 square miles (0.52 km2) of it is water. The total area is 0.48% water. Escondido is also bordered by San Marcos to the west and northern San Diego to the south.