[1] The statistical area "Hoornaar", which also can include the peripheral parts of the village, as well as the surrounding countryside, has a population of around 1580.

Because of the existence of so-called donken, which are hills of sand made by glacial sedimentation, and the lack of them elsewhere, it is known that Hoornaar has a long history.

In the 11th century an attack of Gofried of Lotharingen was prohibited by count Dirk III of Holland.

In the 19th century Hoornaar became depended on the harvest of cannabis for its fibers to make rope with.

Besides stockbreeding, cheese trade and export companies became important to the village economy.