{
  "zip": "78681",
  "type": "standard",
  "type_source": "inferred",
  "city": "Round Rock",
  "other_place_names": [
    "Brushy Creek",
    "Austin",
    "Georgetown"
  ],
  "state": "TX",
  "state_name": "Texas",
  "county": {
    "fips": "48491",
    "name": "Williamson County",
    "short_name": "Williamson"
  },
  "counties": [
    {
      "county_fips": "48491",
      "name": "Williamson County",
      "short_name": "Williamson",
      "weight": 1,
      "basis": "land_area"
    }
  ],
  "location": {
    "lat": 30.541758,
    "lng": -97.716638,
    "source": "gazetteer_internal_point",
    "timezone": "America/Chicago"
  },
  "is_zcta": true,
  "parent_zcta": null,
  "metro": {
    "cbsa_code": "12420",
    "name": "Austin-Round Rock-San Marcos, TX",
    "type": "metro",
    "csa_code": null,
    "csa_name": null
  },
  "demographics": {
    "population": 56691,
    "households": 20135,
    "housing_units": 20781,
    "median_age": 39.3,
    "median_household_income": 137819,
    "median_home_value": 497300,
    "median_rent": 1963,
    "pct_bachelors_plus": 58,
    "mean_commute_min": 23.6,
    "density_per_sqmi": 2444.7
  },
  "business": {
    "establishments": 1432,
    "employees": 19609,
    "annual_payroll_thousands": 1265360
  },
  "tax": {
    "irs_returns": 25410,
    "irs_agi_thousands": 3352853
  },
  "area": {
    "land_sqmi": 23.189,
    "water_sqmi": 0.14
  },
  "nearest_zips": [
    {
      "zip": "78717",
      "miles": 4.2,
      "city": "Austin",
      "state": "TX"
    },
    {
      "zip": "78665",
      "miles": 4.8,
      "city": "Round Rock",
      "state": "TX"
    },
    {
      "zip": "78664",
      "miles": 4.8,
      "city": "Round Rock",
      "state": "TX"
    },
    {
      "zip": "78729",
      "miles": 6.3,
      "city": "Austin",
      "state": "TX"
    },
    {
      "zip": "78728",
      "miles": 6.3,
      "city": "Austin",
      "state": "TX"
    },
    {
      "zip": "78613",
      "miles": 6.6,
      "city": "Cedar Park",
      "state": "TX"
    },
    {
      "zip": "78630",
      "miles": 6.7,
      "city": "Cedar Park",
      "state": "TX"
    },
    {
      "zip": "78627",
      "miles": 6.7,
      "city": "Georgetown",
      "state": "TX"
    },
    {
      "zip": "78764",
      "miles": 7.5,
      "city": "Austin",
      "state": "TX"
    },
    {
      "zip": "78727",
      "miles": 7.8,
      "city": "Austin",
      "state": "TX"
    }
  ],
  "release": "2026-10-12",
  "attribution": {
    "source": "zipcodes.pro",
    "url": "https://zipcodes.pro/zip/78681",
    "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."
  }
}