Business planning by county
Suffolk County, New York
Use a county reference when organizing a market-research brief, outreach territory or business calculation. County population gives geographic context; it does not measure the number of qualified customers.
Identify the right place
Suffolk County is a county or county equivalent in New York. Its five-digit FIPS code is 36103; preserve the leading zero when storing county codes as text. The Gazetteer lists 1,462.31 square miles of water and a representative point at 40.943554, -72.692218. That point identifies the geography; it is not a street address or a site boundary.
Open this county in Census data · Download this county as JSON
Business planning by county checklist
- Define who the offer is for before selecting an area.
- Distinguish residents, businesses and potential customers in the calculation.
- Keep source dates and assumptions attached to your working file.
These are geographic reference records, not contact lists or verified sales leads.
Sources and interpretation
Geography: 2025 U.S. Census Gazetteer. Population: Vintage 2025 estimates, July 1, 2025. County equivalents include parishes, boroughs, independent cities and planning regions. Puerto Rico population is not supplied by this population file.
Population is an estimate, not a live count. Gazetteer land and water measures describe the geographic area; they do not measure service availability, households, businesses or market demand. Match the FIPS code and source vintage when joining another dataset.
More county references in New York
- Steuben County
New York · FIPS 36101
91,855 residents · 2025 estimate
- Sullivan County
New York · FIPS 36105
80,586 residents · 2025 estimate