{
  "zip": "52638",
  "type": "standard",
  "type_source": "inferred",
  "city": "Middletown",
  "other_place_names": [
    "Augusta"
  ],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19057",
    "name": "Des Moines County",
    "short_name": "Des Moines"
  },
  "counties": [
    {
      "county_fips": "19057",
      "name": "Des Moines County",
      "short_name": "Des Moines",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 40.801453,
    "lng": -91.242327,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "15460",
    "name": "Burlington, IA-IL",
    "type": "micro",
    "csa_code": "161",
    "csa_name": "Burlington-Fort Madison, IA-IL"
  },
  "demographics": {
    "population": 508,
    "households": 188,
    "housing_units": 262,
    "median_age": 37.2,
    "median_household_income": 59167,
    "median_home_value": 155500,
    "median_rent": 780,
    "pct_bachelors_plus": 12.8,
    "mean_commute_min": 19.5,
    "density_per_sqmi": 15
  },
  "business": {
    "establishments": 7,
    "employees": 719,
    "annual_payroll_thousands": 48519
  },
  "tax": {
    "irs_returns": 260,
    "irs_agi_thousands": 16406
  },
  "area": {
    "land_sqmi": 33.809,
    "water_sqmi": 0.181
  },
  "nearest_zips": [
    {
      "zip": "52655",
      "miles": 3.5,
      "city": "West Burlington",
      "state": "IA"
    },
    {
      "zip": "52623",
      "miles": 6,
      "city": "Danville",
      "state": "IA"
    },
    {
      "zip": "52624",
      "miles": 6.7,
      "city": "Denmark",
      "state": "IA"
    },
    {
      "zip": "52601",
      "miles": 7,
      "city": "Burlington",
      "state": "IA"
    },
    {
      "zip": "52658",
      "miles": 7.1,
      "city": "Wever",
      "state": "IA"
    },
    {
      "zip": "61425",
      "miles": 11,
      "city": "Carman",
      "state": "IL"
    },
    {
      "zip": "52650",
      "miles": 11.4,
      "city": "Sperry",
      "state": "IA"
    },
    {
      "zip": "52645",
      "miles": 11.4,
      "city": "New London",
      "state": "IA"
    },
    {
      "zip": "52627",
      "miles": 11.6,
      "city": "Fort Madison",
      "state": "IA"
    },
    {
      "zip": "52656",
      "miles": 11.9,
      "city": "West Point",
      "state": "IA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/52638",
    "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."
  }
}