Waardhuizen is a village in the municipality of Altena, in the province of North Brabant, Netherlands.

[5] Waardhuizen was first mentioned in 1292 under the name "Werthuysen".

[4] Emmikhoven en Waardhuizen merged into the municipality of Almkerk in 1879, the latter merged into the municipality of Woudrichem in 1973, which in turn merged into the municipality of Altena in 2019.

[4] Waardhuizen lies south of the Oude Alm stream, not far from the provincial border with South Holland and Utrecht.

The hamlet of Stenenheul belongs to Waardhuizen.