{
  "zip": "94578",
  "type": "standard",
  "type_source": "inferred",
  "city": "San Leandro",
  "other_place_names": [
    "Castro Valley",
    "Ashland"
  ],
  "state": "CA",
  "state_name": "California",
  "county": {
    "fips": "06001",
    "name": "Alameda County",
    "short_name": "Alameda"
  },
  "counties": [
    {
      "county_fips": "06001",
      "name": "Alameda County",
      "short_name": "Alameda",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 37.706765,
    "lng": -122.125565,
    "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": 41769,
    "households": 13904,
    "housing_units": 14672,
    "median_age": 37.9,
    "median_household_income": 94084,
    "median_home_value": 823000,
    "median_rent": 2116,
    "pct_bachelors_plus": 25.8,
    "mean_commute_min": 31.8,
    "density_per_sqmi": 9161.9
  },
  "business": {
    "establishments": 606,
    "employees": 10428,
    "annual_payroll_thousands": 731658
  },
  "tax": {
    "irs_returns": 18650,
    "irs_agi_thousands": 1305447
  },
  "area": {
    "land_sqmi": 4.559,
    "water_sqmi": 0
  },
  "nearest_zips": [
    {
      "zip": "94580",
      "miles": 2,
      "city": "San Lorenzo",
      "state": "CA"
    },
    {
      "zip": "94579",
      "miles": 2.2,
      "city": "San Leandro",
      "state": "CA"
    },
    {
      "zip": "94577",
      "miles": 2.5,
      "city": "San Leandro",
      "state": "CA"
    },
    {
      "zip": "94546",
      "miles": 2.9,
      "city": "Castro Valley",
      "state": "CA"
    },
    {
      "zip": "94541",
      "miles": 3.1,
      "city": "Hayward",
      "state": "CA"
    },
    {
      "zip": "94603",
      "miles": 3.5,
      "city": "Oakland",
      "state": "CA"
    },
    {
      "zip": "94543",
      "miles": 3.6,
      "city": "Hayward",
      "state": "CA"
    },
    {
      "zip": "94605",
      "miles": 4,
      "city": "Oakland",
      "state": "CA"
    },
    {
      "zip": "94614",
      "miles": 4.6,
      "city": "Oakland",
      "state": "CA"
    },
    {
      "zip": "94545",
      "miles": 5.3,
      "city": "Hayward",
      "state": "CA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/94578",
    "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."
  }
}