Of the 12,028 households, 28.7 % include children under the age of 18 living, 33.7 % were married couples living together, 19.8 % have a female householder with no spouse present, and 40.6 % consist of individuals who are not related to one another. The census reports 32.7 % of all households made up of individuals and 9.2 % have someone living alone who is age 65 or older. Norristown’s average household size is 2.52 and the average family size was 3.22.
In the municipality° the population covers a broad range of ages with 25.1 % younger than 18 years of age, 10.5 % from 18 to 24 years, 32.6 % from 25 to 44 years, 20.1 % from 45 to 64 years, and 11.8 % who were 65 years of age or older. The median age was 34 years. For every 100 females there were 94.9 males. For every 100 females age 18 and over, there were 92.8 males.
The median income for a household in the borough was $35,714, and the median income for a family was $42,357. Males had a median income of $32,113 versus $26,746 for females. The per capita income for the borough was $17,977. Norristown’s population includes 17.2 % living below the poverty line. Of the families, 13.5 % have incomes that are below the poverty line. 23.6 % of those under the age of 18 and 13.8 % of those 65 and older were living below the poverty line.