Brielle ( pronunciation), also called Den Briel (Brill in English) is a town, municipality and historic seaport in the western Netherlands, in the province of South Holland, on the north side of the island of Voorne-Putten, at the mouth of the New Maas. The municipality covers an area of 31.12 km² (12.02 mile²) of which 3.63 km² (1.40 mile²) is water. In 2004 its population was 15,948.
The municipality of Brielle also includes the communities Vierpolders, and Zwartewaal.
Brielle is twinned with:
- Queenborough, England, since 1967
- Havlíčkův Brod, Czech Republic, since 1985