{
  "zip": "51521",
  "type": "standard",
  "type_source": "inferred",
  "city": "Avoca",
  "other_place_names": [],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19155",
    "name": "Pottawattamie County",
    "short_name": "Pottawattamie"
  },
  "counties": [
    {
      "county_fips": "19155",
      "name": "Pottawattamie County",
      "short_name": "Pottawattamie",
      "weight": 0.6897,
      "basis": "land_area"
    },
    {
      "county_fips": "19165",
      "name": "Shelby County",
      "short_name": "Shelby",
      "weight": 0.3103,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 41.485468,
    "lng": -95.344684,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "36540",
    "name": "Omaha, NE-IA",
    "type": "metro",
    "csa_code": "420",
    "csa_name": "Omaha-Fremont, NE-IA"
  },
  "demographics": {
    "population": 1953,
    "households": 878,
    "housing_units": 965,
    "median_age": 45.2,
    "median_household_income": 73769,
    "median_home_value": 202800,
    "median_rent": 860,
    "pct_bachelors_plus": 28,
    "mean_commute_min": 23.3,
    "density_per_sqmi": 22.3
  },
  "business": {
    "establishments": 63,
    "employees": 480,
    "annual_payroll_thousands": 27086
  },
  "tax": {
    "irs_returns": 1080,
    "irs_agi_thousands": 91811
  },
  "area": {
    "land_sqmi": 87.409,
    "water_sqmi": 0.478
  },
  "nearest_zips": [
    {
      "zip": "51593",
      "miles": 1.3,
      "city": "Harlan",
      "state": "IA"
    },
    {
      "zip": "51570",
      "miles": 6.9,
      "city": "Shelby",
      "state": "IA"
    },
    {
      "zip": "51536",
      "miles": 7.1,
      "city": "Hancock",
      "state": "IA"
    },
    {
      "zip": "51577",
      "miles": 7.4,
      "city": "Walnut",
      "state": "IA"
    },
    {
      "zip": "51553",
      "miles": 11.6,
      "city": "Minden",
      "state": "IA"
    },
    {
      "zip": "51537",
      "miles": 11.6,
      "city": "Harlan",
      "state": "IA"
    },
    {
      "zip": "51552",
      "miles": 11.9,
      "city": "Marne",
      "state": "IA"
    },
    {
      "zip": "51560",
      "miles": 12.2,
      "city": "Oakland",
      "state": "IA"
    },
    {
      "zip": "51563",
      "miles": 13.8,
      "city": "Persia",
      "state": "IA"
    },
    {
      "zip": "51565",
      "miles": 14.3,
      "city": "Portsmouth",
      "state": "IA"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/51521",
    "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."
  }
}