Poldasht (Persian: پلدشت) is a city in the Central District of Poldasht County in Iran's West Azerbaijan province, serving as capital of both the county and the district.

At the 2006 census, the city population was 8,584 residents in 2,205 households, when it was in the former Poldasht District of Maku County. The following census in 2011 counted 9,963 people in 2,658 households, by which time the district had been separated from the county in the establishment of Poldasht County. The latest census in 2016 showed a population of 11,472 people in 3,377 households. The city lies on the western bank of the Aras River.

Poldasht is a Persian word meaning arable land by the bridge. The city is situated near the border crossing with the Nakhchivan Autonomous Republic of Azerbaijan. Across the Poldasht-Shah Takhti Bridge over the Aras is the Azerbaijani village of Şahtaxtı. It is one of the two Iran-Nakhchivan border crossings; the other is located near the city of Jolfa in East Azerbaijan Province. Also adjacent to Poldasht is the Aras River Dam.