Kościan is a town on the Obra canal in west-central Poland, with a population of 23,952 inhabitants as of June 2014. Situated in the Greater Poland Voivodeship, it is the capital of Kościan County.

Greater Poland Voivodeship is a voivodeship, or province, in west-central Poland. It was created on 1 January 1999 out of the former Poznań, Kalisz, Konin, Piła and Leszno Voivodeships, pursuant to the Polish local government reforms adopted in 1998. The province is named after the region called Greater Poland or Wielkopolska. The modern province includes most of this historic region, except for some western parts.