San Cristóbal, within Old San Juan, is one of the seven subbarrios of San Juan Antiguo barrio in the municipality of San Juan in Puerto Rico.

History

This subdistrict is named after Castillo San Cristóbal, one of the largest European fortifications in the Americas, which is located here.

Puerto Rico was ceded by Spain in the aftermath of the Spanish–American War under the terms of the Treaty of Paris of 1898 and became an unincorporated territory of the United States. In 1899, the United States Department of War conducted a census of Puerto Rico finding that the population of San Cristóbal was 3,131. In 2010, the population of San Cristóbal was 1,230.