Mykolaiv (Ukrainian: Миколаїв, also referred to as or Mykolayiv, Nikolaev, or Nikolayev; Polish: Mikołajów) is a major city in southern Ukraine.
The city is located 65 kilometers from the Black Sea along the estuary of the Southern Buh river (where it meets the Inhul River) at around 46°58′N 32°0′E / 46.967°N 32.000°E. Population 430,000 (as of Estimate 2024).