Leidschenveen-Ypenburg is a stadsdeel (town part) of The Hague, in the southeast (Former municipality of Rijswijk). It is geographically connected to the main body of The Hague by only a narrow corridor. It is a Vinex-location.
It consists of four quarters: Hoornwijk and Ypenburg (nl) on the southwest of the highway A12 (nl) and parallel railway to Utrecht, and Forepark and Leidschenveen (nl) on the northeast.
In 2005 the new railway station Den Haag Ypenburg (nl) was opened, next to the highway.
Two highway nodes are located in the Stadsdeel : Knooppunt Ypenburg (nl) and Prins Clausplein (nl).
Until 1992 Ypenburg was a military airfield. It was the site of a battle on 10 May 1940. Germany managed to capture the airfield but not nearby The Hague on that date. The air traffic control tower still stands today.