Chiajna is a commune located in the southwestern part of Ilfov County within the Muntenia region of Romania. Situated immediately to the west of the national capital, Bucharest, it serves as a local administrative division in the surrounding metropolitan area.
The commune is composed of three distinct villages: Chiajna, Dudu, and Roșu. It functions as a residential and rural locality positioned within the geographical vicinity of the country's largest urban center.