{
  "zip": "51104",
  "type": "standard",
  "type_source": "inferred",
  "city": "Sioux City",
  "other_place_names": [],
  "state": "IA",
  "state_name": "Iowa",
  "county": {
    "fips": "19193",
    "name": "Woodbury County",
    "short_name": "Woodbury"
  },
  "counties": [
    {
      "county_fips": "19193",
      "name": "Woodbury County",
      "short_name": "Woodbury",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 42.534533,
    "lng": -96.403167,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "43580",
    "name": "Sioux City, IA-NE-SD",
    "type": "metro",
    "csa_code": "512",
    "csa_name": "Sioux City-Le Mars, IA-NE-SD"
  },
  "demographics": {
    "population": 23197,
    "households": 8729,
    "housing_units": 9118,
    "median_age": 37.5,
    "median_household_income": 75362,
    "median_home_value": 211100,
    "median_rent": 998,
    "pct_bachelors_plus": 28.9,
    "mean_commute_min": 18.5,
    "density_per_sqmi": 3103.3
  },
  "business": {
    "establishments": 295,
    "employees": 4147,
    "annual_payroll_thousands": 200225
  },
  "tax": {
    "irs_returns": 10360,
    "irs_agi_thousands": 717105
  },
  "area": {
    "land_sqmi": 7.475,
    "water_sqmi": 0.001
  },
  "nearest_zips": [
    {
      "zip": "51103",
      "miles": 2.6,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "51105",
      "miles": 2.6,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "51101",
      "miles": 2.9,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "51108",
      "miles": 3.4,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "57049",
      "miles": 5.5,
      "city": "North Sioux City",
      "state": "SD"
    },
    {
      "zip": "68776",
      "miles": 5.6,
      "city": "South Sioux City",
      "state": "NE"
    },
    {
      "zip": "51109",
      "miles": 6.2,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "51106",
      "miles": 6.7,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "51111",
      "miles": 8,
      "city": "Sioux City",
      "state": "IA"
    },
    {
      "zip": "57038",
      "miles": 9.3,
      "city": "Jefferson",
      "state": "SD"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/51104",
    "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."
  }
}