Chełmno, often known by its full name Chełmno nad Nerem is a village in the administrative district of Gmina Dąbie, within Koło County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 19 km south-east of Koło and 135 km east of the regional capital Poznań. The village has a population of 350. It is the location of the Chełmno Exter…Chełmno, often known by its full name Chełmno nad Nerem is a village in the administrative district of Gmina Dąbie, within Koło County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 19 km south-east of Koło and 135 km east of the regional capital Poznań. The village has a population of 350. It is the location of the Chełmno Extermination Camp Museum founded in 1994.