Holtsville is located in New York. Holtsville, New York has a population of 19,497. Holtsville is more family-centric than the surrounding county with 34.45% of the households containing married families with children. The county average for households married with children is 32.94%.
The median household income in Holtsville, New York is $118,883. The median household income for the surrounding county is $111,660 compared to the national median of $69,021. The median age of people living in Holtsville is 39.3 years.
The average high temperature in July is 82.5 degrees, with an average low temperature in January of 22.9 degrees. The average rainfall is approximately 47.8 inches per year, with 28.3 inches of snow per year.
