{
  "zip": "21704",
  "type": "standard",
  "type_source": "inferred",
  "city": "Frederick",
  "other_place_names": [
    "Urbana",
    "Ballenger Creek",
    "Bartonsville"
  ],
  "state": "MD",
  "state_name": "Maryland",
  "county": {
    "fips": "24021",
    "name": "Frederick County",
    "short_name": "Frederick"
  },
  "counties": [
    {
      "county_fips": "24021",
      "name": "Frederick County",
      "short_name": "Frederick",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 39.354883,
    "lng": -77.375902,
    "source": "gazetteer_internal_point",
    "timezone": "America/New_York"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "47900",
    "name": "Washington-Arlington-Alexandria, DC-VA-MD-WV",
    "type": "metro",
    "csa_code": "548",
    "csa_name": "Washington-Baltimore-Arlington, DC-MD-VA-WV-PA"
  },
  "demographics": {
    "population": 20006,
    "households": 6136,
    "housing_units": 6257,
    "median_age": 38.6,
    "median_household_income": 161063,
    "median_home_value": 612000,
    "median_rent": 2536,
    "pct_bachelors_plus": 57.4,
    "mean_commute_min": 33.5,
    "density_per_sqmi": 751.2
  },
  "business": {
    "establishments": 954,
    "employees": 16206,
    "annual_payroll_thousands": 1024625
  },
  "tax": {
    "irs_returns": 10100,
    "irs_agi_thousands": 1427749
  },
  "area": {
    "land_sqmi": 26.633,
    "water_sqmi": 0.171
  },
  "nearest_zips": [
    {
      "zip": "21717",
      "miles": 3.2,
      "city": "Buckeystown",
      "state": "MD"
    },
    {
      "zip": "21754",
      "miles": 3.6,
      "city": "Ijamsville",
      "state": "MD"
    },
    {
      "zip": "21705",
      "miles": 4.2,
      "city": "Frederick",
      "state": "MD"
    },
    {
      "zip": "21710",
      "miles": 4.4,
      "city": "Adamstown",
      "state": "MD"
    },
    {
      "zip": "21703",
      "miles": 5.3,
      "city": "Frederick",
      "state": "MD"
    },
    {
      "zip": "21770",
      "miles": 6.4,
      "city": "Monrovia",
      "state": "MD"
    },
    {
      "zip": "21701",
      "miles": 6.5,
      "city": "Frederick",
      "state": "MD"
    },
    {
      "zip": "21774",
      "miles": 6.6,
      "city": "New Market",
      "state": "MD"
    },
    {
      "zip": "21709",
      "miles": 8,
      "city": "Frederick",
      "state": "MD"
    },
    {
      "zip": "21714",
      "miles": 8.1,
      "city": "Braddock Heights",
      "state": "MD"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/21704",
    "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."
  }
}