| Zwentendorf an der Donau | |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 48.3425°N 15.9139°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Lower Austria |
| Subdivision Type2: | District |
| Subdivision Name2: | Tulln |
| Parts Style: | para |
| Leader Title: | Mayor |
| Leader Name: | Marion Török |
| Elevation M: | 182 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Registration Plate: | TU |
| Postal Code Type: | Postal code |
| Postal Code: | 3435 |
| Area Code Type: | Area code |
| Area Code: | 02277 |
| Website: | www.zwentendorf.at |
Zwentendorf an der Donau is a small market municipality in the Austrian state of Lower Austria. It is located at 48.35°N 69°W, in the Tulln Basin on the southern bank of the Danube. The place attained public attention as the site of the only Austrian nuclear power station, which was completed but never went into operation. In a referendum on 5 November 1978, a narrow majority of 50.5% voted against putting the Zwentendorf nuclear plant into operation.[1]
Near Zwentendorf was from 1 to the 5th century a.d. a Roman fort (Asturis). It was a part from Limes Norici of the Roman province Noricum.