{
  "zip": "21104",
  "type": "standard",
  "type_source": "inferred",
  "city": "Marriottsville",
  "other_place_names": [
    "Eldersburg",
    "Ellicott City"
  ],
  "state": "MD",
  "state_name": "Maryland",
  "county": {
    "fips": "24027",
    "name": "Howard County",
    "short_name": "Howard"
  },
  "counties": [
    {
      "county_fips": "24027",
      "name": "Howard County",
      "short_name": "Howard",
      "weight": 0.5345,
      "basis": "land_area"
    },
    {
      "county_fips": "24013",
      "name": "Carroll County",
      "short_name": "Carroll",
      "weight": 0.3188,
      "basis": "land_area"
    },
    {
      "county_fips": "24005",
      "name": "Baltimore County",
      "short_name": "Baltimore",
      "weight": 0.1467,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 39.346904,
    "lng": -76.912757,
    "source": "gazetteer_internal_point",
    "timezone": "America/New_York"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "12580",
    "name": "Baltimore-Columbia-Towson, MD",
    "type": "metro",
    "csa_code": "548",
    "csa_name": "Washington-Baltimore-Arlington, DC-MD-VA-WV-PA"
  },
  "demographics": {
    "population": 6052,
    "households": 2097,
    "housing_units": 2204,
    "median_age": 43.1,
    "median_household_income": 191804,
    "median_home_value": 680200,
    "median_rent": 1384,
    "pct_bachelors_plus": 64.4,
    "mean_commute_min": 31.9,
    "density_per_sqmi": 354.9
  },
  "business": {
    "establishments": 157,
    "employees": 1322,
    "annual_payroll_thousands": 72588
  },
  "tax": {
    "irs_returns": 2960,
    "irs_agi_thousands": 535404
  },
  "area": {
    "land_sqmi": 17.052,
    "water_sqmi": 0.81
  },
  "nearest_zips": [
    {
      "zip": "21163",
      "miles": 3.5,
      "city": "Woodstock",
      "state": "MD"
    },
    {
      "zip": "21794",
      "miles": 4.4,
      "city": "West Friendship",
      "state": "MD"
    },
    {
      "zip": "21042",
      "miles": 4.9,
      "city": "Ellicott City",
      "state": "MD"
    },
    {
      "zip": "21723",
      "miles": 5,
      "city": "Cooksville",
      "state": "MD"
    },
    {
      "zip": "21784",
      "miles": 5,
      "city": "Sykesville",
      "state": "MD"
    },
    {
      "zip": "21133",
      "miles": 5.8,
      "city": "Randallstown",
      "state": "MD"
    },
    {
      "zip": "21244",
      "miles": 7.3,
      "city": "Windsor Mill",
      "state": "MD"
    },
    {
      "zip": "21136",
      "miles": 7.3,
      "city": "Reisterstown",
      "state": "MD"
    },
    {
      "zip": "21738",
      "miles": 7.7,
      "city": "Glenwood",
      "state": "MD"
    },
    {
      "zip": "21041",
      "miles": 7.8,
      "city": "Ellicott City",
      "state": "MD"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/21104",
    "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."
  }
}