| Jurisdiction: | Diocese |
| Paranavaí | |
| Latin: | Dioecesis Paranavaiensis |
| Country: | Brazil |
| Denomination: | Catholic Church |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 20 January 1968 (years ago) |
| Cathedral: | Catedral Maria Mãe da Igreja |
| Area Km2: | 8,699 |
| Population: | 237,071 |
| Population As Of: | 2004 |
| Catholics: | 201,510 |
| Catholics Percent: | 85.0 |
| Bishop: | Mário Spaki |
| Website: | www.maedaigreja.org.br |
The Diocese of Paranavaí (la|Dioecesis Paranavaiensis) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Brazil. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Maringá in Paraná.
Its cathedral is Catedral Maria Mãe da Igreja, dedicated to Mary Mother of the Church, in the episcopal see of Paranavaí. The Bishop of Paranavaí has been Mário Spaki since 2018.
, it pastorally served 228,000 Catholics (85.4% of 267,000 total) on 8,699 km2 in 35 parishes and 1 mission with 41 priests (34 diocesan, 7 religious), 64 lay religious (21 brothers, 43 sisters) and 4 seminarians.