Herstal, formerly known as Heristal, or Héristal, is a city and municipality of Wallonia located in the province of Liège, Belgium. It lies along the Meuse river. Herstal is included in the "Greater Liège" agglomeration, which counts about 600,000 inhabitants.

Walloon is a Romance language that is spoken in much of Wallonia and, to a very small extent, in Brussels, Belgium; some villages near Givet, northern France; and a clutch of communities in northeastern Wisconsin, U.S.