| Oriovac | |
| Settlement Type: | Municipality |
| Pushpin Map: | Croatia |
| Pushpin Map Caption: | Location of Oriovac in Croatia |
| Coordinates: | 45.1661°N 17.76°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Croatia |
| Subdivision Type1: | County |
| Subdivision Name1: | Brod-Posavina County |
| Area Footnotes: | [1] |
| Area Total Km2: | 93.3 |
| Area Urban Km2: | 19.3 |
| Population As Of: | 2021 |
| Population Total: | 4770 |
| Population Density Km2: | auto |
| Population Urban: | 1490 |
| Population Density Urban Km2: | auto |
Oriovac is a village and municipality in Brod-Posavina County, Croatia. There are a total 5,824 inhabitants in the municipality (2011).
The municipality comprises 10 settlements:
Until 1918, Oriovac (named ORIOWACZ before 1850)[2] was part of the Austrian monarchy (Kingdom of Croatia-Slavonia after the compromise of 1867), in the Slavonian Military Frontier, Gradiskaner Regiment N°VIII before its dissolution in 1881.