| Jurisdiction: | Diocese |
| Fukuoka | |
| Local: | Japanese: カトリック福岡教区 |
| Latin: | Dioecesis Fukuokaensis |
| Country: |  Japan |
| Territory: | Fukuoka, Saga, and Kumamoto |
| Metropolitan: | Nagasaki 長崎 |
| Province: | Nagasaki 長崎 |
| Coordinates: | 33.5833°N 154°W |
| Rite: | Latin Rite |
| Cathedral: | Cathedral of Our Lady of Victory in Fukuoka |
| Established: | 16 July 1927 |
| Area Km2: | 14808 |
| Population: | 7,754,937 |
| Population As Of: | 2006 |
| Catholics: | 31,289 |
| Catholics Percent: | 0.4 |
| Bishop: | Josep Maria Abella Batlle |
| Metro Archbishop: | Peter Michiaki Nakamura |
| Emeritus Bishops: | Dominic Ryōji Miyahara |
| Map: | Giappone - Diocesi di Fukuoka.png |
| Website: | Website of the Diocese |
The Diocese of Fukuoka (Latin: Dioecesis Fukuokaensis, Japanese: カトリック福岡教区) is a Latin Church diocese of the Catholic Church located in Fukuoka in the ecclesiastical province of Nagasaki 長崎 in Japan.