Holtsville

The CDP was home to 19,714 people, 5,316 households, and 4,454 families as of the 2010 census[2]. There were 2,444.3 people living there per square mile (943.7/km2). At an average density of 778.8 per square mile (300.7/km2), there were 5,418 dwelling units. With 1.7% African American, 0.09% Native American, 4.4% Asian, 0.01% Pacific Islander, 0.2% from other races, and 0.9% from two or more races, the CDP’s racial composition was 81.7% White. Latinos or Hispanics of any race made up 11.1% of the total population.

There were 5,316 households, of which 70.4% were married couples living together, 43.7% included children under the age of 18, 9.9% included a female householder living alone, and 16.2% included non-families. 3.4% of all homes included an individual 65 years of age or older living alone. Individuals made up 12.0% of all households. The average size of a family was 3.47 while the average size of a household was 3.19.

The population of the CDP was dispersed, with 6.9% being 65 years of age or older, 7.5% being between the ages of 18 and 24, 33.5% being between the ages of 25 and 44, and 23.9% being between the ages of 45 and 64. Thirty-four was the median age.

In the CDP, the median income for a family was $71,784 and the median income for a household was $68,544. The median income for men was $50,361, while that of women was $31,709. In the CDP, the per capita income was $24,031. 3.6% of people, including 2.7% of those under 18 and 4.0% of those 65 and older, and 2.4% of families were living in poverty.