Grădiștea is a commune in the northeastern part of Ilfov County, Muntenia, Romania. It is composed of two villages, Grădiștea and Sitaru.
Grădiștea was known as Greci until 1934, after its early inhabitants who sold Greek products. It is the site of Căldărușani Monastery.
The commune is situated in the Wallachian Plain, at an altitude of , in what was once the old-growth forest known as Codrii Vlăsiei.