{
  "zip": "51537",
  "type": "standard",
  "type_source": "inferred",
  "city": "Harlan",
  "other_place_names": [
    "Tennant",
    "Jacksonville",
    "Corley",
    "Westphalia"
  ],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19165",
    "name": "Shelby County",
    "short_name": "Shelby"
  },
  "counties": [
    {
      "county_fips": "19165",
      "name": "Shelby County",
      "short_name": "Shelby",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 41.650135,
    "lng": -95.297189,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 6382,
    "households": 2538,
    "housing_units": 2827,
    "median_age": 43,
    "median_household_income": 65000,
    "median_home_value": 166800,
    "median_rent": 790,
    "pct_bachelors_plus": 25.1,
    "mean_commute_min": 14,
    "density_per_sqmi": 39
  },
  "business": {
    "establishments": 243,
    "employees": 3390,
    "annual_payroll_thousands": 168319
  },
  "tax": {
    "irs_returns": 3080,
    "irs_agi_thousands": 244979
  },
  "area": {
    "land_sqmi": 163.789,
    "water_sqmi": 0.293
  },
  "nearest_zips": [
    {
      "zip": "51578",
      "miles": 7,
      "city": "Westphalia",
      "state": "IA"
    },
    {
      "zip": "51447",
      "miles": 7.3,
      "city": "Kirkman",
      "state": "IA"
    },
    {
      "zip": "51446",
      "miles": 10.3,
      "city": "Irwin",
      "state": "IA"
    },
    {
      "zip": "51593",
      "miles": 11.1,
      "city": "Harlan",
      "state": "IA"
    },
    {
      "zip": "51562",
      "miles": 11.4,
      "city": "Panama",
      "state": "IA"
    },
    {
      "zip": "51543",
      "miles": 11.6,
      "city": "Kimballton",
      "state": "IA"
    },
    {
      "zip": "51531",
      "miles": 11.6,
      "city": "Elk Horn",
      "state": "IA"
    },
    {
      "zip": "51521",
      "miles": 11.6,
      "city": "Avoca",
      "state": "IA"
    },
    {
      "zip": "51530",
      "miles": 11.7,
      "city": "Earling",
      "state": "IA"
    },
    {
      "zip": "51565",
      "miles": 11.7,
      "city": "Portsmouth",
      "state": "IA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/51537",
    "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."
  }
}