Roman Catholic Diocese of Lucknow should not be confused with Anglican Diocese of Lucknow.
| Jurisdiction: | Diocese |
| Lucknow | |
| Latin: | Dioecesis Lucknovensis |
| Local: | लखनऊ के सूबा لکھنؤ کے صوبہ |
| Country: | India |
| Metropolitan: | Agra |
| Province: | Agra |
| Rite: | Latin Rite |
| Cathedral: | St Joseph's Cathedral in Lucknow |
| Patron: | St. Joseph St. Francis of Assisi |
| Area Km2: | 45,124 |
| Population: | 22,681,901 |
| Population As Of: | 2004 |
| Catholics: | 7,305 |
| Catholics Percent: | 0.0 |
| Metro Archbishop: | Albert D'Souza |
| Website: | Website of the Diocese |
| Map: | Map of Roman Catholic Diocese of Lucknow.png |
The Roman Catholic Diocese of Lucknow (Latin: Lucknoven(sis)) is a diocese located in the city of Lucknow in the ecclesiastical province of Agra in India.
The Cathedral School of Lucknow is located in the same compound as St. Joseph's Cathedral.