Obourg (French pronunciation: [ɔbuʁ]; Walloon: Obour) is a sub-municipality of the city of Mons located in the province of Hainaut, Wallonia, Belgium. It was a separate municipality until 1972. In 1964, Saint-Denis was merged into Obourg. On 1 January 1972, Obourg was merged into Mons.

It is the site of the first British soldier to be killed in the First World War, Private John Parr on 21 August 1914.

Obourg was known for its tobacco in the past.

• Canal du Centre (Belgium)
• River Obrecheuil

• 
  Chapel Saint-Macaire (1616).
• 
  Church Saint-Martin.
• 
  Obourg train station