{
  "zip": "94531",
  "type": "standard",
  "type_source": "inferred",
  "city": "Antioch",
  "other_place_names": [],
  "state": "CA",
  "state_name": "California",
  "county": {
    "fips": "06013",
    "name": "Contra Costa County",
    "short_name": "Contra Costa"
  },
  "counties": [
    {
      "county_fips": "06013",
      "name": "Contra Costa County",
      "short_name": "Contra Costa",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 37.956648,
    "lng": -121.77779,
    "source": "gazetteer_internal_point",
    "timezone": "America/Los_Angeles"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "41860",
    "name": "San Francisco-Oakland-Fremont, CA",
    "type": "metro",
    "csa_code": "488",
    "csa_name": "San Jose-San Francisco-Oakland, CA"
  },
  "demographics": {
    "population": 46387,
    "households": 13905,
    "housing_units": 14239,
    "median_age": 38.8,
    "median_household_income": 120927,
    "median_home_value": 701600,
    "median_rent": 3150,
    "pct_bachelors_plus": 32.3,
    "mean_commute_min": 44.2,
    "density_per_sqmi": 3306.7
  },
  "business": {
    "establishments": 559,
    "employees": 7748,
    "annual_payroll_thousands": 517020
  },
  "tax": {
    "irs_returns": 22890,
    "irs_agi_thousands": 1910431
  },
  "area": {
    "land_sqmi": 14.028,
    "water_sqmi": 0
  },
  "nearest_zips": [
    {
      "zip": "94509",
      "miles": 3.1,
      "city": "Antioch",
      "state": "CA"
    },
    {
      "zip": "94561",
      "miles": 5.4,
      "city": "Oakley",
      "state": "CA"
    },
    {
      "zip": "94513",
      "miles": 5.4,
      "city": "Brentwood",
      "state": "CA"
    },
    {
      "zip": "94548",
      "miles": 7,
      "city": "Knightsen",
      "state": "CA"
    },
    {
      "zip": "94517",
      "miles": 7.7,
      "city": "Clayton",
      "state": "CA"
    },
    {
      "zip": "94565",
      "miles": 8.9,
      "city": "Pittsburg",
      "state": "CA"
    },
    {
      "zip": "94511",
      "miles": 9.4,
      "city": "Bethel Island",
      "state": "CA"
    },
    {
      "zip": "94527",
      "miles": 9.8,
      "city": "Concord",
      "state": "CA"
    },
    {
      "zip": "94521",
      "miles": 10.5,
      "city": "Concord",
      "state": "CA"
    },
    {
      "zip": "94505",
      "miles": 11.5,
      "city": "Discovery Bay",
      "state": "CA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/94531",
    "sources_url": "https://zipcodes.pro/sources",
    "license": "Facts derived from US public-domain data (Census, IRS) and GeoNames (CC BY 4.0). Attribution appreciated: zipcodes.pro",
    "note": "A null value means the source did not publish that figure for this ZIP code. It does not mean zero."
  }
}