{
  "zip": "52631",
  "type": "standard",
  "type_source": "inferred",
  "city": "Houghton",
  "other_place_names": [],
  "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": 40.783093,
    "lng": -91.612355,
    "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": 65,
    "households": 26,
    "housing_units": 26,
    "median_age": 42.8,
    "median_household_income": 107083,
    "median_home_value": 255600,
    "median_rent": null,
    "pct_bachelors_plus": 42,
    "mean_commute_min": 18.4,
    "density_per_sqmi": 321.8
  },
  "business": {
    "establishments": 20,
    "employees": 243,
    "annual_payroll_thousands": 16615
  },
  "tax": {
    "irs_returns": null,
    "irs_agi_thousands": null
  },
  "area": {
    "land_sqmi": 0.202,
    "water_sqmi": 0
  },
  "nearest_zips": [
    {
      "zip": "52649",
      "miles": 3.8,
      "city": "Salem",
      "state": "IA"
    },
    {
      "zip": "52648",
      "miles": 4.2,
      "city": "Pilot Grove",
      "state": "IA"
    },
    {
      "zip": "52630",
      "miles": 4.5,
      "city": "Hillsboro",
      "state": "IA"
    },
    {
      "zip": "52657",
      "miles": 5.1,
      "city": "Saint Paul",
      "state": "IA"
    },
    {
      "zip": "52625",
      "miles": 8.7,
      "city": "Donnellson",
      "state": "IA"
    },
    {
      "zip": "52656",
      "miles": 8.7,
      "city": "West Point",
      "state": "IA"
    },
    {
      "zip": "52620",
      "miles": 11.2,
      "city": "Bonaparte",
      "state": "IA"
    },
    {
      "zip": "52626",
      "miles": 11.7,
      "city": "Farmington",
      "state": "IA"
    },
    {
      "zip": "52651",
      "miles": 11.9,
      "city": "Stockport",
      "state": "IA"
    },
    {
      "zip": "52642",
      "miles": 14.1,
      "city": "Rome",
      "state": "IA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/52631",
    "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."
  }
}