| San Cristóbal | |
| Settlement Type: | Subbarrio |
| Image Map1: | San Juan Antiguo.jpg |
| Map Caption1: | San Juan Antiguo is in San Juan |
| Pushpin Map: | Caribbean |
| Pushpin Map Caption: | San Juan is in Puerto Rico |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | San Juan |
| Subdivision Type2: | Barrio |
| Subdivision Name2: | San Juan Antiguo |
| Population Total: | 1358 |
| Population As Of: | 1990 |
| Population Density Km2: | auto |
| Population Note: | Source: Census 1990 |
| Native Name Lang: | es |
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.[1]
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.[2] In 2010, the population of San Cristóbal was 1,230.[3]