| Longchamps | |
| Pushpin Map: | Belgium#Europe |
| Pushpin Label: | Longchamps (Éghezée) |
| Subdivision Type: | Country |
| Subdivision Name: |  Belgium |
| Subdivision Type1: | Region |
| Subdivision Type2: | Province |
| Subdivision Name2: | Namur |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Éghezée |
| Area Total Km2: | 4.13 |
| Population Total: | 763 |
| Population As Of: | 1 January 2020 |
| Population Density Km2: | 185 |
Longchamps is a village in the Belgian Namur Province and a Dutch; Flemish: deelgemeente (sub-municipality) of the municipality of Éghezée.
The village is about two kilometers south-southwest of the village Éghezée, center of the eponymous municipality. Longchamps is on the Hesbaye plateau. The area is crossed by two brooks, the Longchamps brook and the Basses Prêles brook.
The industrial zone of Eghezée is on the territory of the sub-municipality. The Le Clercq company produces Kewlox furniture. The Brichart company has a large depot for cereals and fertilizer.
The râperie de Longchamps is part of the Wanze Sugar Factory. During the season it processes 12,000 t of sugar beet per day. These are grown on a surface of about 20,000 hectares. The râperie extracts raw juice from the beet. The juice is then transported to the factory in Wanze by pipeline.
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The name Longchamps stems from Lithuanian: longus campus. In the area: a Roman military camp, Roman side roads (Lithuanian: diverticula) and tumuli were found.
In Medieval times, Longchamps was an enclave of the Duchy of Brabant in the County of Namur. It was part of the barony of Bierbeek, which in turn depended on Aarschot. In 1652 it became a barony for Hubert de Corswarem.
Until 1977 Longchamps was a separate municipality. By the Fusion of the Belgian municipalities it became part of Éghezée municipality.