Bnin [bnin] (German: Seebrück) is part of the town of Kórnik, southwest of the city of Poznań, in Greater Poland Voivodeship, Poland. It is between Lake Kórnickie and Lake Bnińskie. From 1395-1934, Bnin was a town in its own right. It became part of Kórnik in 1961.