Nassau County

Region: NYC Metro / Long Island · Type: County · Status: Live

Topic	Details
Data site	Open Nassau (+ Open Payroll / Open Budget / Open Checkbook)
Web address	https://opendata.nassaucountyny.gov/
Built on	Socrata (Tyler Technologies)
How to get the data	SODA
API address	https://opennassau.nassaucountyny.gov/resource/{dataset-id}.json ; catalog https://api.us.socrata.com/api/catalog/v1?domains=opennassau.nassaucountyny.gov
Key needed?	No
Datasets	17 datasets (60 assets) (Socrata Discovery API, 2026-11-05)
Last checked	2026-11-05
How we checked	HTTP 200 with an `X-Socrata-Region` header. Title “Open Nassau	Office of the Nassau County Comptroller”. The Discovery API reports the canonical domain as `opennassau.nassaucountyny.gov`.

Notes

Run by the Comptroller’s office, not the County Executive.
opendata. and opennassau.nassaucountyny.gov return the same catalog; the canonical domain in API results is opennassau.
Open Payroll, Open Budget and Open Checkbook (openpayroll., openbudget., opencheckbook.nassaucountyny.gov) are separate Socrata Open Budget / Open Payroll apps. Each returns HTTP 200, and their pages reference Socrata / Tyler. They do not appear in the Discovery API as their own domains.

curl -s "https://opennassau.nassaucountyny.gov/resource/kwpd-uzf7.json?\$select=count(*)"

Result (2026-11-05): [{"count":"5559"}], rows in “ARPA Total Spending”.