{
  "zip": "20857",
  "type": "unknown",
  "type_source": "inferred",
  "city": "Rockville",
  "other_place_names": [],
  "state": "MD",
  "state_name": "Maryland",
  "county": {
    "fips": "24031",
    "name": "Montgomery County",
    "short_name": "Montgomery"
  },
  "counties": [],
  "location": {
    "lat": 39.084,
    "lng": -77.1528,
    "source": "geonames",
    "timezone": "America/New_York"
  },
  "is_zcta": false,
  "parent_zcta": "20850",
  "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": null,
    "households": null,
    "housing_units": null,
    "median_age": null,
    "median_household_income": null,
    "median_home_value": null,
    "median_rent": null,
    "pct_bachelors_plus": null,
    "mean_commute_min": null,
    "density_per_sqmi": null
  },
  "business": {
    "establishments": 5,
    "employees": 73,
    "annual_payroll_thousands": 4209
  },
  "tax": {
    "irs_returns": null,
    "irs_agi_thousands": null
  },
  "area": {
    "land_sqmi": null,
    "water_sqmi": null
  },
  "nearest_zips": [
    {
      "zip": "20847",
      "miles": 0,
      "city": "Rockville",
      "state": "MD"
    },
    {
      "zip": "20849",
      "miles": 0,
      "city": "Rockville",
      "state": "MD"
    },
    {
      "zip": "20883",
      "miles": 0.4,
      "city": "Gaithersburg",
      "state": "MD"
    },
    {
      "zip": "20850",
      "miles": 1.5,
      "city": "Rockville",
      "state": "MD"
    },
    {
      "zip": "20851",
      "miles": 1.8,
      "city": "Rockville",
      "state": "MD"
    },
    {
      "zip": "20852",
      "miles": 2.7,
      "city": "Rockville",
      "state": "MD"
    },
    {
      "zip": "20853",
      "miles": 3.4,
      "city": "Rockville",
      "state": "MD"
    },
    {
      "zip": "20855",
      "miles": 3.8,
      "city": "Derwood",
      "state": "MD"
    },
    {
      "zip": "20880",
      "miles": 4.1,
      "city": "Washington Grove",
      "state": "MD"
    },
    {
      "zip": "20877",
      "miles": 4.4,
      "city": "Gaithersburg",
      "state": "MD"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/20857",
    "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."
  }
}