The first European Regional Contest (ERC) was organized in 1983.
In 1992, the region was split in west and east, which created the Western European Regional Contest (WERC).
In 1994, the region was split again in north and south, which created the North Western European Regional Collegiate Programming Contest (NWERCPC), or from 1998, the Northwestern Europe Regional Contest (NWERC). (source)
In 2009, the parts of Germany in SWERC were added to NWERC.
In 2019, Lithuania en Estonia were added to the region.