Val-d'Oise has a rich history and culture that dates back to prehistoric times. The area was inhabited by several different tribes before it was conquered by the Romans in the 1st century BC. During the Middle Ages, the region was an important center of trade and commerce, and many of its towns and villages grew around fortified castles and abbeys. The Renaissance also left its mark on Val-d'Oise, with many of the region's chateaux and gardens built during this period.

Today, Val-d'Oise is a diverse and multicultural region that celebrates its heritage and traditions. Many towns and villages host festivals and events throughout the year to showcase local food, music, and culture. The department is also home to several museums and cultural centers, such as the Musée de l'Archéologie Nationale, which houses an extensive collection of prehistoric and Gallo-Roman artifacts, and the Centre Culturel et Artistique Georges Pompidou, which hosts concerts, exhibitions, and other cultural events.

In addition to its rich cultural heritage, Val-d'Oise is also known for its cuisine, which features local specialties such as Brie de Meaux cheese, Goussainville pears, and Montmorency cherries. The department is also famous for its wines, particularly those produced in the Vexin region. Overall, Val-d'Oise is a region that values its history and culture, and continues to celebrate and preserve its traditions for future generations.