| Jurisdiction: | Diocese |
| Kaposvár | |
| Latin: | Dioecesis Kaposvarensis |
| Local: | Kaposvári egyházmegye |
| Province: | Veszprém |
| Denomination: | Catholic Church |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Area Km2: | 6,790 |
| Population: | 397,800 |
| Population As Of: | 2019 |
| Catholics: | 292,000 |
| Catholics Percent: | 73.0 |
| Bishop: | László Varga |
| Metro Archbishop: | Udvardy György |
| Map: | Map of Diocese of Kaposvar.png |
| Map Size: | 250px |
| Coordinates: | 46.3577°N 17.7879°W |
| Headquarters: | Kaposvár |
The Diocese of Kaposvár (Latin: Dioecesis Kaposvarensis) is a Latin suffragan diocese in the ecclesiastical province of the Metropolitan Archdiocese of Veszprém, in southwestern Hungary.
Its cathedral episcopal, Our Lady of the Assumption Cathedral, is dedicated to the Blessed Virgin Mary (Hungarian: Nagyboldogasszony-székesegyház), in the city of Kaposvár, capital of Somogy County.
, it pastorally served 290,425 Catholics (73.5% of 395,207 total) on 6,764 km² in 102 parishes with 95 priests (diocesan), 4 deacons, 6 lay religious (sisters) and 8 seminarians.