Dnipropetrovsk or Dnepropetrovsk formerly Yekaterinoslav is Ukraine's fourth largest city with one million inhabitants. It is located southeast of Ukraine's capital Kiev on the Dnieper River, in the south-central region of the country. Dnipropetrovsk is the administrative centre of the Dnipropetrovsk Oblast (province). Within the Dnipropetrovsk Metropolitan area there are 1,004,000 or 1,360,000 people.
A vital industrial centre of Ukraine, Dnipropetrovsk was one of the key centres of the nuclear, arms, and space industries of the former Soviet Union. In particular, it is home to Yuzhmash, a major space and ballistic missile designer and manufacturer. Because of its military industry, the city was a closed city until the 1990s. In 1917 Yekaterinoslav was renamed Sicheslav by the Ukrainian People's Republic; this name lapsed in 1919.