Grez-Doiceau (French pronunciation: [ɡʁe dwaso]; Walloon: Gré; Dutch: Graven, Dutch pronunciation: [ˈɣraːvən]) is a municipality of Wallonia located in the Belgian province of Walloon Brabant. On January 1, 2006, Grez-Doiceau had a total population of 12,403. The total area is 55.44 km² which gives a population density of 224 inhabitants per km². Grez-Doiceau is watered by the Train, a tributary of the Dyle.
Grez-Doiceau | |
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Municipality | |
Location of Grez-Doiceau ![]() | |
Grez-Doiceau Location in Belgium
The municipality of Grez-Doiceau in Walloon Brabant | |
| Coordinates: 50°44′N 04°42′E | |
| Country | Belgium |
| Community | French Community |
| Region | Wallonia |
| Province | Walloon Brabant |
| Arrondissement | Nivelles |
| Government | |
| • Mayor | Paul Vandeleene |
| • Governing party/ies | Ecolo Avec Vous DéFi Citoyens |
| Area | |
| • Total | 55.44 km2 (21.41 sq mi) |
| Population (2018-01-01)[1] | |
| • Total | 13,368 |
| • Density | 240/km2 (620/sq mi) |
| Postal codes | 1390 |
| Area codes | 010 |
| Website | www.grez-doiceau.be |
The municipality consists of the following districts: Archennes, Biez, Bossut-Gottechain, Grez-Doiceau, and Nethen.
The Nobel Prize-winning cytologist and biochemist Christian de Duve (1917–2013) died in Grez-Doiceau.

Places adjacent to Grez-Doiceau | ||||||||||||||||
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Municipalities in the province of Walloon Brabant, Wallonia, Belgium | ||
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| Nivelles |
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Bold indicates cities | ||
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