Ventspils (Latvian: [ˈvæntspils]; German: Windau, pronounced [ˈvɪndaʊ̯]; see ) is a state city in northwestern Latvia in the historical Courland region of Latvia, and is the sixth largest city in the country. At the beginning of 2020, Ventspils had a population of 33,906. It is situated on the Venta River and the Baltic Sea, and has an ice-free port. The city's name literally means "castle on the Venta", referring to the Livonian Order's castle built alongside the Venta River.