{
  "zip": "94528",
  "type": "standard",
  "type_source": "inferred",
  "city": "Diablo",
  "other_place_names": [
    "Danville"
  ],
  "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": 37.841477,
    "lng": -121.958154,
    "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": 1049,
    "households": 424,
    "housing_units": 463,
    "median_age": 43,
    "median_household_income": 207500,
    "median_home_value": 2000001,
    "median_rent": null,
    "pct_bachelors_plus": 79.8,
    "mean_commute_min": 41.8,
    "density_per_sqmi": 909
  },
  "business": {
    "establishments": 22,
    "employees": 170,
    "annual_payroll_thousands": 13196
  },
  "tax": {
    "irs_returns": null,
    "irs_agi_thousands": null
  },
  "area": {
    "land_sqmi": 1.154,
    "water_sqmi": 0
  },
  "nearest_zips": [
    {
      "zip": "94526",
      "miles": 2.3,
      "city": "Danville",
      "state": "CA"
    },
    {
      "zip": "94507",
      "miles": 2.8,
      "city": "Alamo",
      "state": "CA"
    },
    {
      "zip": "94506",
      "miles": 3.9,
      "city": "Danville",
      "state": "CA"
    },
    {
      "zip": "94570",
      "miles": 4.4,
      "city": "Moraga",
      "state": "CA"
    },
    {
      "zip": "94517",
      "miles": 4.9,
      "city": "Clayton",
      "state": "CA"
    },
    {
      "zip": "94583",
      "miles": 5.1,
      "city": "San Ramon",
      "state": "CA"
    },
    {
      "zip": "94596",
      "miles": 5.4,
      "city": "Walnut Creek",
      "state": "CA"
    },
    {
      "zip": "94582",
      "miles": 5.8,
      "city": "San Ramon",
      "state": "CA"
    },
    {
      "zip": "94598",
      "miles": 6.1,
      "city": "Walnut Creek",
      "state": "CA"
    },
    {
      "zip": "94588",
      "miles": 6.2,
      "city": "Pleasanton",
      "state": "CA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/94528",
    "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."
  }
}