Greater Poland (sometimes Great Poland; Polish Wielkopolska, German: Grosspolen, Latin: Polonia Maior) is one of the historical regions of Poland. It is located in western-central Poland, in the valleys of the Warta River and its confluences.
Its principal cities are Poznan, Leszno, Kalisz and Gniezno. Most of the historical region (except some southwestern communes) is included the Greater Poland voivodship (administrative province) created in 1999.
Wielkopolska was the core of the early medieval Polish state, and at times was called just Poland (in Latin: Polonia). The name of Greater Poland is mentioned first in Latin form Polonia Maior in 1257, and in Polish form w Wielkej Polszcze in 1449.