Gostyń is a town in western Poland, seat of the Gostyń County and Gmina Gostyń in the Greater Poland Voivodeship. According to 31 Decemb…Gostyń is a town in western Poland, seat of the Gostyń County and Gmina Gostyń in the Greater Poland Voivodeship. According to 31 December 2023 data its population was 27,846. The total area of Gostyń is 10.79 square kilometres. The town comprises 1% of the area of the county and 8% of the commune, according to Główny Urząd Statystyczny.