{
  "zip": "37640",
  "type": "standard",
  "type_source": "inferred",
  "city": "Butler",
  "other_place_names": [],
  "state": "TN",
  "state_name": "Tennessee",
  "county": {
    "fips": "47091",
    "name": "Johnson County",
    "short_name": "Johnson"
  },
  "counties": [
    {
      "county_fips": "47091",
      "name": "Johnson County",
      "short_name": "Johnson",
      "weight": 0.6354,
      "basis": "land_area"
    },
    {
      "county_fips": "47019",
      "name": "Carter County",
      "short_name": "Carter",
      "weight": 0.3646,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 36.326824,
    "lng": -81.974686,
    "source": "gazetteer_internal_point",
    "timezone": "America/New_York"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 3851,
    "households": 1899,
    "housing_units": 2503,
    "median_age": 53.4,
    "median_household_income": 55402,
    "median_home_value": 174000,
    "median_rent": 687,
    "pct_bachelors_plus": 20.9,
    "mean_commute_min": 34.4,
    "density_per_sqmi": 36.7
  },
  "business": {
    "establishments": 37,
    "employees": 130,
    "annual_payroll_thousands": 5461
  },
  "tax": {
    "irs_returns": 1430,
    "irs_agi_thousands": 108280
  },
  "area": {
    "land_sqmi": 105,
    "water_sqmi": 7.636
  },
  "nearest_zips": [
    {
      "zip": "28692",
      "miles": 7.7,
      "city": "Vilas",
      "state": "NC"
    },
    {
      "zip": "37643",
      "miles": 8.8,
      "city": "Elizabethton",
      "state": "TN"
    },
    {
      "zip": "28679",
      "miles": 8.8,
      "city": "Sugar Grove",
      "state": "NC"
    },
    {
      "zip": "28622",
      "miles": 9.2,
      "city": "Elk Park",
      "state": "NC"
    },
    {
      "zip": "37658",
      "miles": 10.9,
      "city": "Hampton",
      "state": "TN"
    },
    {
      "zip": "28698",
      "miles": 11.9,
      "city": "Zionville",
      "state": "NC"
    },
    {
      "zip": "37683",
      "miles": 12.2,
      "city": "Mountain City",
      "state": "TN"
    },
    {
      "zip": "28604",
      "miles": 12.2,
      "city": "Banner Elk",
      "state": "NC"
    },
    {
      "zip": "37687",
      "miles": 12.3,
      "city": "Roan Mountain",
      "state": "TN"
    },
    {
      "zip": "37691",
      "miles": 12.5,
      "city": "Trade",
      "state": "TN"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/37640",
    "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."
  }
}