Dalhem is a municipality of Wallonia located in the province of Liège, Belgium. On 1 January 2012 Dalhem had a total population of 6,996. …Dalhem is a municipality of Wallonia located in the province of Liège, Belgium. On 1 January 2012 Dalhem had a total population of 6,996. The total area is 36.06 km² which gives a population density of 180 inhabitants per km². The name Dalhem is of Germanic origin and means "place of residence in the valley".