Westbroek is a village in the Dutch province of Utrecht. It is a part of the municipality of De Bilt, and lies about 6 km northwest of Bilthoven. Westbroek consists mainly of a ribbon of farms along a dike. The village is surrounded by a number of polders: the Polder Westbroek, the Kerkeindse Polder, and the Polder Achttienhoven in the north, and the Molenpold…Westbroek is a village in the Dutch province of Utrecht. It is a part of the municipality of De Bilt, and lies about 6 km northwest of Bilthoven. Westbroek consists mainly of a ribbon of farms along a dike. The village is surrounded by a number of polders: the Polder Westbroek, the Kerkeindse Polder, and the Polder Achttienhoven in the north, and the Molenpolder and Polder de Kooi in the south. The Molenpolder is a nature reserve.