Holtsville is located in New York. Holtsville, New York has a population of 20,201. Holtsville is more family-centric than the surrounding county with 41.01% of the households containing married families with children. The county average for households married with children is 35.14%.
The median household income in Holtsville, New York is $98,955. The median household income for the surrounding county is $92,838 compared to the national median of $57,652. The median age of people living in Holtsville is 41.4 years.
The average high temperature in July is 83.6 degrees, with an average low temperature in January of 23 degrees. The average rainfall is approximately 46.3 inches per year, with 31.9 inches of snow per year.
