ZIP code 11521 is officially located in the state of New york, primarily serving the city of Freeport. It falls under the administrative jurisdiction of Nassau County. When planning mail delivery, logistics routing, or demographic research, 11521 operates within the Eastern Time (ET) timezone and supports the 531 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 11521 ZIP Code Tabulation Area is approximately Data Not Available. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,521.