{
  "zip": "57440",
  "type": "standard",
  "type_source": "inferred",
  "city": "Frankfort",
  "other_place_names": [
    "Glendale Colony",
    "Camrose Colony",
    "Spink Colony"
  ],
  "state": "SD",
  "state_name": "South Dakota",
  "county": {
    "fips": "46115",
    "name": "Spink County",
    "short_name": "Spink"
  },
  "counties": [
    {
      "county_fips": "46115",
      "name": "Spink County",
      "short_name": "Spink",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 44.853426,
    "lng": -98.256687,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 466,
    "households": 122,
    "housing_units": 165,
    "median_age": 54.5,
    "median_household_income": 54625,
    "median_home_value": 132800,
    "median_rent": null,
    "pct_bachelors_plus": 26.5,
    "mean_commute_min": 23.5,
    "density_per_sqmi": 3.3
  },
  "business": {
    "establishments": 4,
    "employees": 9,
    "annual_payroll_thousands": 429
  },
  "tax": {
    "irs_returns": 220,
    "irs_agi_thousands": 16129
  },
  "area": {
    "land_sqmi": 141.93,
    "water_sqmi": 0.689
  },
  "nearest_zips": [
    {
      "zip": "57436",
      "miles": 8.9,
      "city": "Doland",
      "state": "SD"
    },
    {
      "zip": "57477",
      "miles": 13.6,
      "city": "Turton",
      "state": "SD"
    },
    {
      "zip": "57469",
      "miles": 15.4,
      "city": "Redfield",
      "state": "SD"
    },
    {
      "zip": "57258",
      "miles": 16.2,
      "city": "Raymond",
      "state": "SD"
    },
    {
      "zip": "57348",
      "miles": 16.7,
      "city": "Hitchcock",
      "state": "SD"
    },
    {
      "zip": "57424",
      "miles": 17.4,
      "city": "Ashton",
      "state": "SD"
    },
    {
      "zip": "57476",
      "miles": 20.3,
      "city": "Tulare",
      "state": "SD"
    },
    {
      "zip": "57322",
      "miles": 20.8,
      "city": "Carpenter",
      "state": "SD"
    },
    {
      "zip": "57429",
      "miles": 21.4,
      "city": "Brentford",
      "state": "SD"
    },
    {
      "zip": "57461",
      "miles": 23.3,
      "city": "Mellette",
      "state": "SD"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/57440",
    "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."
  }
}