Westland is a municipality in the western Netherlands, in the province of South Holland. It covers an area of 90.74 km² of which 9.47 km² is co…Westland is a municipality in the western Netherlands, in the province of South Holland. It covers an area of 90.74 km² of which 9.47 km² is covered by water and had a population of 111,382 in 2021. Towns and other settlements: De Lier, 's-Gravenzande, Monster, Naaldwijk, Wateringen, Heenweg, Honselersdijk, Kwintsheul, Maasdijk, Poeldijk, and Ter Heijde.