Heiloo is a municipality and town in the Netherlands, located in the province of North Holland. The community is part of the cooperation region Kennemerland and is located in the historical region of West Friesland. Heiloo had a population of 24,144 in 2021.

North Holland is a province of the Netherlands in the northwestern part of the country. It is located on the North Sea, north of South Holland and Utrecht, and west of Friesland and Flevoland. As of January 2023, it had a population of about 2,952,000 and a total area of 4,092 km2 (1,580 sq mi), of which 1,429 km2 (552 sq mi) is water.