Ādaži is a town in the Pierīga region of Latvia, situated on the left bank of the Gauja river. It serves as the administrative center of Ādaži Municipality in the Vidzeme region, and is also the extraterritorial seat of its Ādaži Parish.
The town lies along the A1 highway, about 21.6 km from the center of Riga. The Gauja, Latvia's longest river, flows along the Ādaži River, and its tributary the Vējupe divides the town into two parts.