City · United States

Holtsville

Holtsville is a hamlet and census-designated place (CDP) in Suffolk County, on Long Island, in New York, United States. As of the 2020 census, Holtsville had a population of 18,937.

Good to know

• Population: 19,714.
• Area: 18.4 sq km.
• Elevation: 32 m.
• Timezone: America/New_York.

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