Hoeilaart (Dutch pronunciation: [ˈɦuilaːrt]) is a municipality in the province of Flemish Brabant, Belgium.

The name Hoeilaart is of Gallic-Celtic origin, coming from "Ho-Lar," meaning a high clearing in the woods.

The municipality only comprises the town of Hoeilaart proper.

Hoeilaart also sometimes called "The Glass Village" because of the greenhouse grape cultivation that once took place.

Local minorities consist of nationals from many European Union countries, USA and Canada, and numerous French-speakers.