{
  "zip": "21639",
  "type": "standard",
  "type_source": "inferred",
  "city": "Greensboro",
  "other_place_names": [],
  "state": "MD",
  "state_name": "Maryland",
  "county": {
    "fips": "24011",
    "name": "Caroline County",
    "short_name": "Caroline"
  },
  "counties": [
    {
      "county_fips": "24011",
      "name": "Caroline County",
      "short_name": "Caroline",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 38.958732,
    "lng": -75.782499,
    "source": "gazetteer_internal_point",
    "timezone": "America/New_York"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": null,
  "demographics": {
    "population": 4682,
    "households": 1743,
    "housing_units": 1916,
    "median_age": 37.7,
    "median_household_income": 62772,
    "median_home_value": 269400,
    "median_rent": 1107,
    "pct_bachelors_plus": 13.5,
    "mean_commute_min": 38.8,
    "density_per_sqmi": 141.5
  },
  "business": {
    "establishments": 73,
    "employees": 403,
    "annual_payroll_thousands": 17262
  },
  "tax": {
    "irs_returns": 2260,
    "irs_agi_thousands": 134096
  },
  "area": {
    "land_sqmi": 33.087,
    "water_sqmi": 0.317
  },
  "nearest_zips": [
    {
      "zip": "21636",
      "miles": 4,
      "city": "Goldsboro",
      "state": "MD"
    },
    {
      "zip": "21660",
      "miles": 5.7,
      "city": "Ridgely",
      "state": "MD"
    },
    {
      "zip": "21629",
      "miles": 7.3,
      "city": "Denton",
      "state": "MD"
    },
    {
      "zip": "21640",
      "miles": 7.8,
      "city": "Henderson",
      "state": "MD"
    },
    {
      "zip": "21641",
      "miles": 9,
      "city": "Hillsboro",
      "state": "MD"
    },
    {
      "zip": "19952",
      "miles": 9.6,
      "city": "Harrington",
      "state": "DE"
    },
    {
      "zip": "19943",
      "miles": 9.9,
      "city": "Felton",
      "state": "DE"
    },
    {
      "zip": "19964",
      "miles": 10,
      "city": "Marydel",
      "state": "DE"
    },
    {
      "zip": "21657",
      "miles": 10.8,
      "city": "Queen Anne",
      "state": "MD"
    },
    {
      "zip": "21644",
      "miles": 12,
      "city": "Ingleside",
      "state": "MD"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/21639",
    "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."
  }
}