About this map

This is a public visualization of every registered voter in the five boroughs of New York City, sourced from the New York State Board of Elections via a FOIL request. The data is legally public, but pulling 5.3 million names + addresses + parties + voting histories into one queryable map is a different posture than the CSV sitting on a state FTP.

Data source

• NYS Voter File via FOIL (March 30, 2026 drop)
• NYC Geocodes via NYC Department of City Planning AddressPoint open dataset
• Fallback geocoding via NYC Planning Labs GeoSearch (Pelias on PAD)
• Basemap tiles via Carto Dark / OpenStreetMap

How it works (no servers!)

The map is a static Astro site hosted on Cloudflare Pages. The data is five Parquet files on a public Cloudflare R2 bucket. Your browser uses DuckDB-wasm to read those Parquets directly via HTTP range requests — column-pruned, partition-pruned, and cached after the first hit. There's no API server, no database, no authentication. Everything you see runs in your tab.

Source

Code on GitHub.