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.

It merged into Maartensdijk in 1957, and has been a part of the De Bilt municipality since 2001.

On 26 December 1481, Westbroek was the site of a major battle, known as the Battle of Westbroek, between the armies of the prince-bishopric of Utrecht and Holland, with Holland winning a decisive victory.