In Carstairs most households have family size of 2 persons. This accounts for about 52.14% of the general population. Families of 3 persons account for 20.09% of the population. Families of 4 persons account for 18.38% of the population. Families of 5 or more persons account for 9.4% of the population.
A household includes all the persons who occupy a housing unit as their usual place of residence. Persons per household, or average household size, is obtained by dividing the number of persons in households by the number of households (or householders).
|2 persons||52.14 %|
|3 persons||20.09 %|
|4 persons||18.38 %|
|5 or more persons||9.40 %|