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 responses with 99.9% uptime SLA for Pro and Enterprise tiers.

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/api/v1/city/{cityStateKey}
GET/api/v1/search?q={query}
POST/api/v1/bulk

Get Your API Key

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