Developer API

Build with ZIP Code Data

Access comprehensive US demographics, housing prices, and location data through our simple REST API. Start free with 100 requests/day.

Example Request

curl -X GET "https://zipcodefacts.com/api/v1/zip/90210"   -H "Authorization: Bearer zcf_your_api_key"

// Response
{
  "zipCode": "90210",
  "city": "Beverly Hills",
  "state": "CA",
  "county": "Los Angeles",
  "demographics": {
    "population": 21741,
    "medianHouseholdIncome": 153042,
    "medianHomeValue": 2500000
  },
  "housing": {
    "zillowHomeValueIndex": 3250000,
    "appreciation1Year": 4.2
  }
}

Why Use Our API?

41,000+ ZIP Codes

Complete coverage of US ZIP codes with demographics, housing data, and location info.

Fast & Reliable

Low-latency JSON responses served from our hosted database. No uptime SLA is currently offered.

Secure

API key authentication with rate limiting to protect your applications.

RESTful Design

Simple REST API with JSON responses. Easy to integrate with any language.

API Endpoints

GET/api/v1/zip/{zipCode}Get data for a specific ZIP code

GET/api/v1/city/{cityStateKey}Get city data with ZIP codes

GET/api/v1/search?q={query}Search ZIP codes and cities

POST/api/v1/bulkBulk lookup (up to 100 ZIPs)

Get Your API Key

Start with our free tier - 100 requests/day, no credit card required. Upgrade anytime for higher limits.