Quaregnon is a municipality of Wallonia located in the province of Hainaut, Belgium. On 1 January 2018 Quaregnon had a total population of 19,…Quaregnon is a municipality of Wallonia located in the province of Hainaut, Belgium. On 1 January 2018 Quaregnon had a total population of 19,006. The total area is 11.08 km² which gives a population density of 1,716 inhabitants per km².