| Jurisdiction: | Diocese |
| Žilina | |
| Latin: | Dioecesis Zilinensis |
| Local: | Žilinská Diecéza |
| Coat Size: | 150 |
| Country: | Slovakia |
| Metropolitan: | Žilina |
| Territory: | NW of Trenčín and W of Žilina regions |
| Province: | Bratislava |
| Deaneries: | 12 |
| Population: | 592,200 |
| Population As Of: | 2014 |
| Catholics: | 484,200 |
| Catholics Percent: | 81.8 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Sui Iuris Church: | Latin Church |
| Established: | 14 February 2008 |
| Cathedral: | Cathedral of the Holy Trinity in Žilina |
| Metro Archbishop: | Stanislav Zvolenský |
| Vicar General: | Mons. ThLic. Marek Hriadel |
| Map: | Slovacchia - Diocesi di Zilina.png |
| Website: | Website of the Diocese |
The Diocese of Žilina (sk|Žilinská Diecéza, la|Dioecesis Zilinensis) is a Latin diocese of the Catholic Church in north-western Slovakia including parts of the Trenčín and Žilina regions. It has its seat in Žilina. The current bishop is Tomáš Galis.
The diocese was established on 14 February 2008 from the northern parts of the Diocese of Nitra, which shifted more to the south and from a small part of the Diocese of Banská Bystrica.
In 2018, for the diocese’s tenth anniversary, a Silver Cross started to be awarded.[1]
The newest activities in 2022 from the newly established Caplan, the Roman Catholic priest Michal Tichy, were connected to another willingness project—The Wikimedia Foundation's interests. The priest allowed Wikipedians, from the first point, to publish the edited record of his Holy Mass freely to the whole world. His own homilies were firstly recorded 18. April 2022 in consideration of the Evangelium of Mathew 28, 8–15.
The diocese currently has 12 deaneries in the towns: