| Type: | parish |
| Official Name: | Santo Ildefonso |
| Image Location: | LocalFregPorto-SantoIldefonso.svg |
| Region: | Norte |
| Metro: | Metropolitan Area of Porto |
| District: | Porto |
| Municipality: | Porto |
| Coordinates: | 41.153°N -8.608°W |
| Area Total: | 1.24 |
| Population Total: | 9029 |
| Population As Of: | 2011 |
| Dissolved: | 2013 |
Santo Ildefonso (pronounced as /pt/) is a former civil parish in the municipality of Porto, Portugal. In 2013, the parish merged into the new parish Cedofeita, Santo Ildefonso, Sé, Miragaia, São Nicolau e Vitória.[1] The population in 2011 was 9,029,[2] in an area of 1.24 km2.[3]