The commune of Biwer, population 1,497, is located 20 kilometers north of
Luxembourg City.
Biwer (population 616), Biwerbach, Boudler, Boudlerbach, Breinert, Brouch, Hagelsdorf, Wecker, Wecker-Gare, and Weydig are boroughs within the commune of Biwer.
The N1 and the A1 roadways pass just south of the boroughs of Biwer, most of which lie along the N14/CR136 roadway which splits off to the north.