Mihăilești is a town located in Giurgiu County, Muntenia, Romania. It administers three villages: Drăgănescu, Novaci, and Popești. It officially became a town in 1989, as a result of the Romanian rural systematization program.

The town stands beside the river Argeș, which at this point is dammed, forming a lake about long. The lake was created as part of the Danube–Bucharest Canal project and feeds a hydro-electric plant.

At the 2021 census, Mihăilești had a population of 7,760; of those, 84.34% were Romanians and 2.18% Roma.

Argedava Popești village is the location of an important archeological discovery: a large Dacian settlement believed by some historians such as Vasile Pârvan and to be the Argedava mentioned in the Decree of Dionysopolis. This ancient source links Argedava with the Dacian king Burebista, and it is believed to be his court or capital.

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