{
  "zip": "52309",
  "type": "standard",
  "type_source": "inferred",
  "city": "Monmouth",
  "other_place_names": [],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19097",
    "name": "Jackson County",
    "short_name": "Jackson"
  },
  "counties": [
    {
      "county_fips": "19097",
      "name": "Jackson County",
      "short_name": "Jackson",
      "weight": 0.7208,
      "basis": "land_area"
    },
    {
      "county_fips": "19105",
      "name": "Jones County",
      "short_name": "Jones",
      "weight": 0.2792,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 42.131684,
    "lng": -90.888642,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 443,
    "households": 190,
    "housing_units": 190,
    "median_age": 56.3,
    "median_household_income": 56250,
    "median_home_value": 155400,
    "median_rent": null,
    "pct_bachelors_plus": 14.3,
    "mean_commute_min": 27.5,
    "density_per_sqmi": 12.9
  },
  "business": {
    "establishments": 4,
    "employees": 18,
    "annual_payroll_thousands": 867
  },
  "tax": {
    "irs_returns": 180,
    "irs_agi_thousands": 12089
  },
  "area": {
    "land_sqmi": 34.268,
    "water_sqmi": 0.05
  },
  "nearest_zips": [
    {
      "zip": "52207",
      "miles": 4,
      "city": "Baldwin",
      "state": "IA"
    },
    {
      "zip": "52321",
      "miles": 4.9,
      "city": "Onslow",
      "state": "IA"
    },
    {
      "zip": "52362",
      "miles": 7.8,
      "city": "Wyoming",
      "state": "IA"
    },
    {
      "zip": "52212",
      "miles": 10.5,
      "city": "Center Junction",
      "state": "IA"
    },
    {
      "zip": "52323",
      "miles": 10.7,
      "city": "Oxford Junction",
      "state": "IA"
    },
    {
      "zip": "52060",
      "miles": 10.9,
      "city": "Maquoketa",
      "state": "IA"
    },
    {
      "zip": "52032",
      "miles": 11.2,
      "city": "Bernard",
      "state": "IA"
    },
    {
      "zip": "52033",
      "miles": 11.7,
      "city": "Cascade",
      "state": "IA"
    },
    {
      "zip": "52254",
      "miles": 13.1,
      "city": "Lost Nation",
      "state": "IA"
    },
    {
      "zip": "52079",
      "miles": 13.8,
      "city": "Zwingle",
      "state": "IA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/52309",
    "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."
  }
}