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 km<sup>2</sup> which gives a population density of 1,716 inhabitants per km<sup>2</sup>.
The municipality consists of the following districts: Quaregnon and Wasmuel.