1. Start with the service area, not a population assumption
North Massapequa is recorded as a census-designated place in Nassau County, New York. The 2020–2024 American Community Survey 5-year population estimate for North Massapequa is 17,877, with a margin of error of 1,170.
Recommended approach
Define the geographic relationship you want the intake to clarify. For example, decide whether location is an initial screening question, a routing field, or a detail your team confirms later. Keep North Massapequa and Nassau County distinct in the flow so the intake reflects your actual service territory.
