Wielki Wełcz is a village in the administrative district of Gmina Grudziądz, within Grudziądz County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 13 km north of Grudziądz and 65 km north of Toruń.

History

Around 1560 Dutch Mennonites settled in the village, founding the first such community in the area. In 1604, starost of Grudziądz Maciej Konopacki leased 39 włókas of land to the Mennonites for 40 years, with the stipulation that after that time the Mennonites would have priority to buy the land outright. The village suffered in a flood in 1661.