Suffolk County
URL: https://knowledge.ivjn.us/en/places/ny-suffolk-county.html

Suffolk County is a county in New York, United States, with county seat Riverhead.

## Administrative divisions

Suffolk County is a county in New York, United States; the county seat is Riverhead[^uscb2023].

## Basic facts

- State: [New York](https://knowledge.ivjn.us/en/places/new-york.html)
- County seat: Riverhead[^uscb2023]
- Division level: county[^uscb2023]

## Parent division

Located in [New York](https://knowledge.ivjn.us/en/places/new-york.html).

Updated: 2026-10-29

Relations:
- Located in: New York https://knowledge.ivjn.us/en/places/new-york.html

Mentioned in:
- New York https://knowledge.ivjn.us/en/places/new-york.html

Sources:
- Suffolk County (Wikipedia) https://en.wikipedia.org/wiki/Suffolk_County
- U.S. Census Bureau 2023 FIPS state and county codes https://www.census.gov/library/reference/code-lists/ansi.html