Popești-Leordeni (Romanian pronunciation: [poˌpeʃtʲ le.orˈdenʲ]) is a town in Ilfov County, Muntenia, Romania, 9 km (5.6 mi) south of downtown Bucharest, although from the northern edge of the town to the southern edge of Bucharest the distance is less than 100 m (330 ft).

Most of its inhabitants commute to Bucharest, with Popești-Leordeni being seen as a satellite town of the Romanian capital.

Popești-Leordeni was historically the site of two separate villages — Popești (name derived from popă, "priest", akin to the word "pope") and Leordeni (name derived from leurdă, "ramsons" or Allium ursinum).

The villages were first attested during the 16th century: Leordeni was a domain of the Băleanu family of Wallachian boyars, while Popești was included in the lands belonging to ancestors of the chronicler Radu Popescu.

Popești and Leordeni were united into a single commune in 1873; boyar lands were divided by successive land reforms, and the Conduratu manor house was passed to the Costa-Foru family (whose member Constantin Costa-Foru was a well-known journalist in the interwar period).