| Oupeye | |
| Map: | OupeyeLocatie.png |
| Map-Legend: | Location of Oupeye in Liège province |
| Arms: | Blason Oupeye.svg |
| Flag: | Flag of Oupeye.png |
| Arrondissement: | Liège |
| Nis: | 62079 |
| Mayor: | Serge Fillot (PS) |
| Majority: | PS, CDH |
| Postal-Codes: | 4680-4684 |
| Telephone-Area: | 04 |
| Web: | www.oupeye.be |
| Coordinates: | 50.7°N 44°W |
Oupeye (in French pronounced as /upɛj/; Walloon: Oûpêye) is a municipality of Wallonia located in the province of Liège, Belgium.
On January 1, 2006, Oupeye had a total population of 23,581. The total area is 36.11 km2 which gives a population density of 653 inhabitants per km2.
The municipality consists of the following districts: Haccourt, Hermalle-sous-Argenteau, Hermée, Heure-le-Romain, Houtain-Saint-Siméon, Oupeye, and Vivegnis.
Chertal is a narrow isthmus approximately 1.5 km southeast of Oupeye bounded by the Albert Canal and Meuse. Since 1963 the land has been the site of a steel factory founded by Espérance-Longdoz (as of 2010 part of ArcelorMittal Liège).