| St Joseph's Church | |
|---|---|
 | |
 | |
| Address | Samphao Lom, Phra Nakhon Si Ayutthaya district, Ayutthaya, Thailand |
| Denomination | Roman Catholic |
| History | |
| Status | Active |
| Founded | 1666 |
| Architecture | |
| Architect(s) | Joachim Grassi |
| Style | Romanesque |
| Years built | 1883-1891 |
| Administration | |
| Archdiocese | Bangkok |
St Joseph's Church is a Roman Catholic church in Ayutthaya, Thailand. It is situated on the banks of the Chao Phraya River in the old city, in the place where the French Catholic mission was first established in Thailand. Although the first church on the site was founded in 1666, the current building was completed in 1891 to the design of Joachim Grassi.