The town (nearly 4,500 inhabitants), located on the edge of the forests of Chantilly and Coye-la-Forêt, is the largest of the municipalities of Val-d'Oise. It includes four hamlets: Gascourt, Herivaux, Thimecourt and Bertinval.
The city of origin was built on a hill of average altitude (105 m maximum) on the plateau of Parisis or Pays de France. As early as the Middle Ages, the name of Luzarches, then Lusarca, appears in acts of judgment rendered by Thierry III in 679, Clovis III in 692 and Charlemagne in 775. Royal possession, Lusarca is part of the County of Clermont and has a church parish.
The first known lord of the city is Renaud, Count of Clermont. Over the centuries, Lusarca will almost always know two lords: that of the castle of En-Haut (Castle St Côme) and that of the castle of En-Bas (Castle Motte).
Famous for its autumn fairs, Luzarches is also a relay station on the road to Amiens. In the seventeenth century, there will be sixteen hostels and hostels.
The first world war leaves Luzarches a historical memory: it is here, in the place called the "Hill of the Mountain" that is the extreme advance of the German army during its march on Paris in September 1914.
