| Opponitz | |
| Settlement Type: | Municipality |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 47.8667°N 63°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Lower Austria |
| Subdivision Type2: | District |
| Subdivision Name2: | Amstetten |
| Parts Style: | para |
| Leader Title: | Mayor |
| Leader Name: | Johann Lueger |
| Elevation M: | 422 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 3342 |
| Area Code Type: | Area code |
| Area Code: | 07444 |
Opponitz is a town in the district of Amstetten in Lower Austria in Austria.
Opponitz lies on the Ybbs River in the Mostviertel in Lower Austria. About 72.52 percent of the municipality is forested.