Need a dataset API that can query by ZIP code and state

Here are a few good ways to get a dataset API that can query by ZIP code and state, depending on what data you need:

If you want US demographic / geographic data

1. US Census API

   • Can query by state, ZIP Code Tabulation Area (ZCTA), county, tract, etc.
   • Good for population, income, housing, age, education.
   • Docs: https://www.census.gov/data/developers/data-sets.html

2. OpenDataSoft / Socrata datasets

   • Many public datasets support filtering by ZIP and state through a REST API.
   • Good if you’re looking for city/state-specific open data.
   • Often uses ?select=...&where=...

3. Data.gov / state open data portals

   • Many have APIs or downloadable datasets with ZIP/state fields.
   • Best if you need a specific government dataset.

If you want business/location data

1. Google Places API
   • Query by ZIP/state indirectly via geocoding or location bias.
2. Yelp Fusion API
   • Can search businesses by location, including ZIP and state.
3. Foursquare Places API
   • Location search with ZIP/state support via geocoding or neighborhood.

If you want postal/geographic lookup

1. Zipcodebase API
   • Simple ZIP/state lookup.
2. Zippopotam.us
   • Free API for ZIP code lookup by country/ZIP.
   • Example:
     • https://api.zippopotam.us/us/90210
3. US ZIP Code API providers
   • Many commercial APIs support ZIP → city/state, plus nearby ZIPs.

If you want your own dataset API

A simple design would be:

• GET /records?zip=90210&state=CA
• GET /records?state=CA
• GET /records?zip=90210

If you want, I can also help you with one of these:

• recommend the best API for your exact use case
• give you sample code
• show how to build your own API with ZIP/state filtering