Suffolk County boundary

The administrative boundary of Suffolk County, a county in New York, the United States, covering 6,096.3 km². Get its polygon in one call, as GeoJSON, KML, WKT, GML or SVG.

About 1.5 million people live in Suffolk County. Its 6,096 km² are 4.3% of New York.

r404243countyadmin_level 6

Facts

Kind: county
Admin level: 6
Country: United States
Area: 6,096.3 km²
Population: 1,501,587
ISO 3166: —
Wikidata: Q54065
OpenStreetMap: r404243
Centroid: 40.9336, -72.7466
Cached: 2026-10-30

Get this boundary

Copy-paste calls for r404243. One unit each with a free key; the low-detail polygon also works without one.

Polygon as GeoJSON

curl "https://geocodeai.dev/v1/boundaries/r404243?detail=medium" \
  -H "Authorization: Bearer $GEOCODE_API_KEY"

Is a point inside Suffolk County?

curl -X POST "https://geocodeai.dev/v1/boundaries/r404243/contains" \
  -H "Authorization: Bearer $GEOCODE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"points":[[-72.7466,40.9336]]}'

Download a file

GeoJSON, low detailFree, no key needed.

Every format and detail level below needs a free API key. Get a free API key

geojsonhttps://geocodeai.dev/v1/boundaries/r404243.geojson?detail=medium
kmlhttps://geocodeai.dev/v1/boundaries/r404243.kml?detail=medium
wkthttps://geocodeai.dev/v1/boundaries/r404243.wkt?detail=medium
svghttps://geocodeai.dev/v1/boundaries/r404243.svg?detail=medium
gmlhttps://geocodeai.dev/v1/boundaries/r404243.gml?detail=medium

Each export redirects to a permanent CDN file. Add ?detail=low|medium|high|full. Formats

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Nearby boundaries

Boundary data © OpenStreetMap contributors, ODbL. Need several boundaries as one zone, or a zone written in words?

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