Herstal (French pronunciation: [ɛʁstal] ⓘ; Walloon: Hesta), formerly known as Heristal, or Héristal, is a city and municipality of Wallonia located in the province of Liège, Belgium.

The name Herstal is of Franconian origin, consisting of the elements hari ("army") and stal ("resting place", "camp"; compare Modern German Stall, "stable").

[2][3] Pippin of Herstal (ca 635–714), Mayor of the Palace and de facto ruler of Austrasia and Neustria and founder of the family that established the Carolingian dynasty, probably chose this location as his main residence because of its proximity to the major cities of Tongeren, Maastricht, and Liège.

Pippin was the father of Charles Martel, victor of the decisive Battle of Tours that stopped the Arab-Muslim advance into northwestern Europe, and great grandfather of Charlemagne, also supposedly born in Herstal.

Today, Herstal's economy is picking up again, with more than 200 companies established on its territory, including Techspace Aero, which manufactures precision parts for the European Space Agency’s Ariane rocket.