| 19 High Street | |
| Caption: | 19 High Street |
| Type: | Private residential house |
| Location: | Cardiff |
| Area: | Llandaff |
| Architecture: | 17th century style |
| Map Relief: | yes |
| Pushpin Label: | 19 High Street |
| Coordinates: | 51.4938°N -3.2189°W |
| Designation1: | Grade II |
| Designation1 Offname: | 19 High Street, Llandaff |
| Designation1 Number: | 13732 |
19 High Street is a small mid-19th-century residential domestic building in Llandaff, Cardiff, Wales. The building is a two-storey Grade II listed structure and it was listed because it is "Included for its group value with the other listed buildings around The Cathedral Green and on the High Street".
Cadw believe that the small house was probably built in the mid-19th century in the 17th century style. The house is built of roughly coursed multi-coloured Radyr stone with some cut stones. Other buildings in High Street include St Andrew, St Cross, 2-4 High Street and 6 High Street that are also Grade II listed.