your free PDF travel guide for Holtsville
best time to go
Wikipedia says:
Holtsville is a hamlet (and census-designated place) in Suffolk County, New York, United States. The population was 17,006 at the 2000 census.
Holtsville is the location of an IRS Processing Center (which has the lowest assigned numerical ZIP Code, 00501) and is in the Town of Brookhaven and the Town of Islip. (...) more....


