| Petrijanec | |
| Settlement Type: | Municipality |
| Pushpin Map: | Croatia |
| Pushpin Map Caption: | Location of Petrijanec in Croatia |
| Coordinates: | 46.35°N 16.23°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Croatia |
| Subdivision Type1: | County |
| Subdivision Name1: | Varaždin County |
| Area Footnotes: | [1] |
| Area Total Km2: | 47.9 |
| Area Urban Km2: | 13.8 |
| Population As Of: | 2021 |
| Population Total: | 4553 |
| Population Density Km2: | auto |
| Population Urban: | 1349 |
| Population Density Urban Km2: | auto |
Petrijanec is a village and municipality in Croatia in Varaždin County.
According to the 2011 census, there are a total of 4,812 inhabitants, in the following settlements:
The absolute majority of population are Croats.
The ancient Roman settlement of Aquaviva, Pannonia is believed to have been located in the same place.