Grou is a town in the province Friesland of the Netherlands and had around 5655 citizens in January 2017. Since 2014 Grou is part of th…Grou is a town in the province Friesland of the Netherlands and had around 5655 citizens in January 2017. Since 2014 Grou is part of the municipality of Leeuwarden. The town is located on the Pikmeer lake and the Prinses Margrietkanaal. Heineken operated a distribution centre for Friesland in Grou for 25 years until 2004.