{
  "zip": "57031",
  "type": "standard",
  "type_source": "inferred",
  "city": "Gayville",
  "other_place_names": [],
  "state": "SD",
  "state_name": "South Dakota",
  "county": {
    "fips": "46135",
    "name": "Yankton County",
    "short_name": "Yankton"
  },
  "counties": [
    {
      "county_fips": "46135",
      "name": "Yankton County",
      "short_name": "Yankton",
      "weight": 0.7674,
      "basis": "land_area"
    },
    {
      "county_fips": "46027",
      "name": "Clay County",
      "short_name": "Clay",
      "weight": 0.2326,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 42.875524,
    "lng": -97.185859,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "49460",
    "name": "Yankton, SD",
    "type": "micro",
    "csa_code": null,
    "csa_name": null
  },
  "demographics": {
    "population": 784,
    "households": 394,
    "housing_units": 429,
    "median_age": 42.6,
    "median_household_income": 64794,
    "median_home_value": 137100,
    "median_rent": 602,
    "pct_bachelors_plus": 13.9,
    "mean_commute_min": 19.1,
    "density_per_sqmi": 19.9
  },
  "business": {
    "establishments": 8,
    "employees": 41,
    "annual_payroll_thousands": 2509
  },
  "tax": {
    "irs_returns": 320,
    "irs_agi_thousands": 24589
  },
  "area": {
    "land_sqmi": 39.355,
    "water_sqmi": 1.117
  },
  "nearest_zips": [
    {
      "zip": "68774",
      "miles": 6.3,
      "city": "Saint Helena",
      "state": "NE"
    },
    {
      "zip": "57072",
      "miles": 7.9,
      "city": "Volin",
      "state": "SD"
    },
    {
      "zip": "57046",
      "miles": 8.3,
      "city": "Mission Hill",
      "state": "SD"
    },
    {
      "zip": "57069",
      "miles": 10.3,
      "city": "Vermillion",
      "state": "SD"
    },
    {
      "zip": "68792",
      "miles": 11.1,
      "city": "Wynot",
      "state": "NE"
    },
    {
      "zip": "57073",
      "miles": 11.2,
      "city": "Wakonda",
      "state": "SD"
    },
    {
      "zip": "68736",
      "miles": 13,
      "city": "Fordyce",
      "state": "NE"
    },
    {
      "zip": "57078",
      "miles": 13.5,
      "city": "Yankton",
      "state": "SD"
    },
    {
      "zip": "57037",
      "miles": 16.1,
      "city": "Irene",
      "state": "SD"
    },
    {
      "zip": "68751",
      "miles": 16.5,
      "city": "Maskell",
      "state": "NE"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/57031",
    "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."
  }
}