| Walhain | |
| Picture-Legend: | Ruins of Walhain castle (12th century) |
| Map: | Walhain Brabant-Wallon Belgium Map.svg |
| Map-Legend: | The municipality in the province of Walloon Brabant |
| Arms: | Blason Walhain.svg |
| Flag: | Walhain vlag.svg |
| Arrondissement: | Nivelles |
| Nis: | 25124 |
| Mayor: | Xavier Dubois (cdH) (Avenir Communal) |
| Majority: | Avenir Communal - Ecolo |
| Parties: | Avenir Communal WAL-1 Ecolo |
| Postal-Codes: | 1457 |
| Telephone-Area: | 010 |
| Web: | www.walhain.be |
| Coordinates: | 50.6333°N 46°W |
Walhain (in French pronounced as /walɛ̃/; Walloon: Walin) is a municipality of Wallonia located in the Belgian province of Walloon Brabant. It consists of the former municipalities of Nil-Saint-Vincent-Saint-Martin, Tourinnes-Saint-Lambert and Walhain-Saint-Paul.
The Belgian National Geographic Institute, the Belgian national cartographical service, calculated that the geographical centre of Belgium lay in this municipality, in Nil-Saint-Vincent at 50.6411°N 4.6681°W.[1]
Walhain-Saint-Paul, Walhain, Sart-lez-Walhain, Nil-Saint-Vincent, Nil-Saint-Martin, Nil-Pierreux, Lerinnes, Tourinnes-Saint-Lambert, Tourinnes les Ourdons et Perbais
Walhain has two successful national division sport teams:
Firstly, they have a semi-professional football club, RFC Wallonia Walhain CG playing in the Promotion D, which is the 4th tier of Belgian football league. They unfortunately couldn't avoid relegation in 2007 after more than 10 years in the third division.
They also have a good volleyball club, with both women's and men's teams playing in the second national division (the first division in Belgium being professional).