 The median age was 37.6 years old, lower than the national median age at 40.6 years old.There are 42,984 private dwellings with an occupancy rate of 87.3%.The most common ethnic origins in Waterloo according to the 2016 Census are German (23.3%), English (23.1%), Canadian (21.2%), Scottish (18.3%), Irish (17.4%), Chinese (9.9%), French (8.4%), Dutch (5.0%), Polish (5.0%) and East Indian (4.7%).