Bierzwienna Długa [bjɛʐˈvjɛnna ˈdwuɡa] is a village in the administrative district of Gmina Kłodawa, within Koło County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) north of Kłodawa, 21 km (13 mi) north-east of Koło, and 136 km (85 mi) east of the regional capital Poznań.