Hillegom () is a town and municipality in the western Netherlands, in the province of South Holland. The municipality covers an area of 13.48 km2 (5.20 sq mi) of which 0.56 km2 (0.22 sq mi) is water. Hillegom is part of an area called the Duin- en Bollenstreek ("Dune and Bulb Region"). As such, a large portion of the local economy was traditionally geared to the cultivation of bulb flowers. It is bordered by the municipalities of Bloemendaal, Bennebroek (to the north), Haarlemmermeer (to the east), Lisse (to the south), and Noordwijkerhout (to the west).