{
  "zip": "63304",
  "type": "standard",
  "type_source": "inferred",
  "city": "Saint Charles",
  "other_place_names": [
    "Weldon Spring",
    "Cottleville",
    "St. Peters",
    "O'Fallon",
    "Weldon Spring Heights"
  ],
  "state": "MO",
  "state_name": "Missouri",
  "county": {
    "fips": "29183",
    "name": "St. Charles County",
    "short_name": "St. Charles"
  },
  "counties": [
    {
      "county_fips": "29183",
      "name": "St. Charles County",
      "short_name": "St. Charles",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 38.706113,
    "lng": -90.68602,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "41180",
    "name": "St. Louis, MO-IL",
    "type": "metro",
    "csa_code": "476",
    "csa_name": "St. Louis-St. Charles-Farmington, MO-IL"
  },
  "demographics": {
    "population": 43195,
    "households": 16284,
    "housing_units": 16690,
    "median_age": 40.7,
    "median_household_income": 114442,
    "median_home_value": 351000,
    "median_rent": 1749,
    "pct_bachelors_plus": 49.3,
    "mean_commute_min": 24.4,
    "density_per_sqmi": 783.9
  },
  "business": {
    "establishments": 958,
    "employees": 12151,
    "annual_payroll_thousands": 631230
  },
  "tax": {
    "irs_returns": 21490,
    "irs_agi_thousands": 2514894
  },
  "area": {
    "land_sqmi": 55.1,
    "water_sqmi": 3.294
  },
  "nearest_zips": [
    {
      "zip": "63338",
      "miles": 3.3,
      "city": "Cottleville",
      "state": "MO"
    },
    {
      "zip": "63368",
      "miles": 3.9,
      "city": "O Fallon",
      "state": "MO"
    },
    {
      "zip": "63005",
      "miles": 4.7,
      "city": "Chesterfield",
      "state": "MO"
    },
    {
      "zip": "63006",
      "miles": 6.6,
      "city": "Chesterfield",
      "state": "MO"
    },
    {
      "zip": "63341",
      "miles": 7.2,
      "city": "Defiance",
      "state": "MO"
    },
    {
      "zip": "63367",
      "miles": 7.5,
      "city": "Lake Saint Louis",
      "state": "MO"
    },
    {
      "zip": "63376",
      "miles": 7.7,
      "city": "Saint Peters",
      "state": "MO"
    },
    {
      "zip": "63303",
      "miles": 8,
      "city": "Saint Charles",
      "state": "MO"
    },
    {
      "zip": "63017",
      "miles": 8.5,
      "city": "Chesterfield",
      "state": "MO"
    },
    {
      "zip": "63346",
      "miles": 8.6,
      "city": "Flinthill",
      "state": "MO"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/63304",
    "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."
  }
}