North Massapequa is a community in the Town of Oyster Bay.
There were 6,281 households out of which 36.5% had children under the age of 18 living with them, 71.9% were married couples living together, 9.3% had a female householder with no husband present, and 15.8% were non-families. 13.2% of all households were made up of individuals and 7.8% had someone living alone who was 65 years of age or older. The average household size was 3.05 and the average family size was 3.33.
In the CDP the population was spread out with 24.4% under the age of 18, 6.2% from 18 to 24, 30.4% from 25 to 44, 22.6% from 45 to 64, and 16.4% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 93.1 males. For every 100 females age 18 and over, there were 90.3 males.
The median income for a household in the CDP was $70,825, and the median income for a family was $76,958. Males had a median income of $54,754 versus $35,859 for females. The per capita income for the CDP was $25,957. About 1.5% of families and 2.9% of the population were below the poverty line, including 2.4% of those under age 18 and 3.0% of those age 65 or over.
North Massapequa is, as the rest of the Massapequas (with the exception of East Massapequa) predominantly Italian American, with near 50% of its citizens claiming Italian ancestry.