It was created on 1 January 1999 out of the former Poznan, Kalisz, Konin, Pila and Leszno voivodships as a result of Local Government Reorganization Act of 1998. The voivodship's name recalls the region's traditional name of Greater Poland (Wielkopolska).
It is second in area and third in population among the country's sixteen voivodships, with 29,826 km² and 3.4 million inhabitants. Its principal cities are:
Voivodships of Poland:Major cities and towns
(population 2003)Administrative division
Greater Poland Voivodship | Kuyavian-Pomeranian Voivodship | Lesser Poland Voivodship | Lodz Voivodship | Lower Silesian Voivodship | Lublin Voivodship | Lubusz Voivodship | Masovian Voivodship | Opole Voivodship | Subcarpathian Voivodship | Podlasie Voivodship | Pomeranian Voivodship | Swietokrzyskie Voivodship | Silesian Voivodship | Warmian-Masurian Voivodship | West Pomeranian Voivodship