Rochefort is a city and municipality of Wallonia located in the province of Namur, Belgium, close to the Ardennes. On 1 January 2006, Rochef…Rochefort is a city and municipality of Wallonia located in the province of Namur, Belgium, close to the Ardennes. On 1 January 2006, Rochefort had a total population of 12,038. The total area is 165.27 km² which gives a population density of 73 inhabitants per km². It was a resort in the 19th century.