Kupon-e Vosta (Persian: كوپن وسطي) was a village in Rostam-e Seh Rural District of Sorna District, Rostam County, Fars province, Iran.

At the 2006 National Census, its population was 568 in 111 households, when it was in the former Rostam District of Mamasani County. The following census in 2011 counted 559 people in 141 households, by which time the district had been separated from the county in the establishment of Rostam County.

After the census, the villages of Kupon-e Olya, Kupon-e Sofla, and Kupon-e Vosta were merged to establish the city of Kupon.