{
  "zip": "52639",
  "type": "standard",
  "type_source": "inferred",
  "city": "Montrose",
  "other_place_names": [
    "Fort Madison"
  ],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19111",
    "name": "Lee County",
    "short_name": "Lee"
  },
  "counties": [
    {
      "county_fips": "19111",
      "name": "Lee County",
      "short_name": "Lee",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 40.532566,
    "lng": -91.478323,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "22800",
    "name": "Fort Madison, IA",
    "type": "micro",
    "csa_code": "161",
    "csa_name": "Burlington-Fort Madison, IA-IL"
  },
  "demographics": {
    "population": 1745,
    "households": 717,
    "housing_units": 797,
    "median_age": 51.2,
    "median_household_income": 68625,
    "median_home_value": 163800,
    "median_rent": 800,
    "pct_bachelors_plus": 10.6,
    "mean_commute_min": 22.6,
    "density_per_sqmi": 44.6
  },
  "business": {
    "establishments": 18,
    "employees": 126,
    "annual_payroll_thousands": 3493
  },
  "tax": {
    "irs_returns": 800,
    "irs_agi_thousands": 49318
  },
  "area": {
    "land_sqmi": 39.114,
    "water_sqmi": 3.498
  },
  "nearest_zips": [
    {
      "zip": "52619",
      "miles": 4.6,
      "city": "Argyle",
      "state": "IA"
    },
    {
      "zip": "52632",
      "miles": 7.2,
      "city": "Keokuk",
      "state": "IA"
    },
    {
      "zip": "62354",
      "miles": 7.2,
      "city": "Nauvoo",
      "state": "IL"
    },
    {
      "zip": "52625",
      "miles": 10.2,
      "city": "Donnellson",
      "state": "IA"
    },
    {
      "zip": "63472",
      "miles": 10.2,
      "city": "Wayland",
      "state": "MO"
    },
    {
      "zip": "63430",
      "miles": 10.3,
      "city": "Alexandria",
      "state": "MO"
    },
    {
      "zip": "63465",
      "miles": 10.6,
      "city": "Revere",
      "state": "MO"
    },
    {
      "zip": "52627",
      "miles": 10.8,
      "city": "Fort Madison",
      "state": "IA"
    },
    {
      "zip": "62341",
      "miles": 11.6,
      "city": "Hamilton",
      "state": "IL"
    },
    {
      "zip": "62358",
      "miles": 11.9,
      "city": "Niota",
      "state": "IL"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/52639",
    "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."
  }
}