| Jurisdiction: | Diocese |
| Varaždin | |
| Latin: | Dioecesis Varasdinensis |
| Local: | Varaždinska biskupija |
| Country: |  Croatia |
| Province: | Zagreb |
| Metropolitan: | Archdiocese of Zagreb |
| Area Km2: | 3,100 |
| Population: | 380,566 |
| Population As Of: | 2014 |
| Catholics: | 362,247 |
| Catholics Percent: | 95.2 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 5 July 1997 |
| Cathedral: | Cathedral of the Blessed Virgin Mary in Varaždin |
| Patron: | Saint Marko Krizin |
| Bishop: | Bože Radoš |
| Bishop Title: | Bishop |
| Metro Archbishop: | Josip Bozanić |
| Suffragan: | for one --> |
| Archdeacon: | for one--> |
| Emeritus Bishops: | Josip Mrzljak |
The Diocese of Varaždin (Latin: Dioecesis Varasdinensis) is a Latin ecclesiastical territory or diocese of the Catholic Church in northern Croatia. The diocese is centred in the city of Varaždin. It is a new diocese, having only been erected on July 5, 1997, from the Archdiocese of Zagreb. Bishop Marko Culej was the first to be head of the diocese. Bishop Bože Radoš is the current bishop of Varaždin.[1]
The Church of the Assumption of Mary into Heaven was built in 1646 and was proclaimed a cathedral on September 28, 1997.
The diocese's patron saint is Saint Marko of Križevci.