Costești is a town in Argeș County, in the Muntenia region of Romania. It is located in the southern part of the country, within the historical region of Wallachia.
As of the 2021 census, the town had a population of 9,460. The town administers six villages: Broșteni, Lăceni, Pârvu Roșu, Podu Broșteni, Smei, and Stârci.