Finland Proper or Southwest Finland (Finnish: Varsinais-Suomi; Swedish: Egentliga Finland; Latin: Ducatus Finlandiae Meridionalis, literally "Duchy of Southern Finland") is a historical province in southwestern Finland, administered by its historic capital of Turku (Swedish: Åbo). It borders Satakunta, Tavastia, and Uusimaa. It is also bounded by the Baltic Sea facing Åland. There was also a modern region by the name Finland Proper.
Southwest Finnish dialects are spoken in Southwest Finland.